Vietnam Weather and Climate in September

Vietnam has different weather and climate conditions depending on the region and month. In September, you can expect a mix of rain, sun, heat, and coolness in different parts of the country.
Vietnam is a diverse and beautiful country that offers something for everyone. But what is the weather like in September? Is it a good time to visit? In this article, we will give you an overview of the weather conditions in different regions of Vietnam, as well as some tips on what to do and where to go in September. Whether you are looking for culture, nature, or relaxation, you will find it in Vietnam.
September is another transitional month in Vietnam when the weather keeps changing in each part of the country. If the South is steady in the hot weather with rainy conditions and dene humidity, the Central regions get the increase on wet weather, especially towards the end of month when rain is expected to become more frequent. In contrary, there is less rainfall in the North.
For the mountainous areas, the conditions are improving which allows trekking as a possible option again. The plenty of sunny days also give more opportunity on choice of Vietnam’s incredible cities and natural landscapes. Keep reading this article for more information to prepare accordingly for the best holiday to Vietnam in this month.
Table of Contents
Weather in September in some famous places in Vietnam

Vietnam has different climate zones and weather patterns depending on the region and altitude.
September marks the transitional period for Vietnam’s weather. In the North, autumn begins and rainfall diminishes, while the Center and South experience peak rainy season with potential storms or typhoons. Nevertheless, visiting Vietnam during this time has its advantages. The weather remains warm and sunny, allowing you to fully enjoy the country’s stunning beaches, cities, and natural landscapes.
During September, rainfall in the North and South of Vietnam is initially high but gradually decreases towards the end of the month. Conversely, Central Vietnam experiences a significant increase in rainfall, ranging from moderate to very high.
If you plan to visit Vietnam in September, rest assured that it is still a favorable time to explore the country. You can bask in the beauty of its remarkable beaches, cities, and natural wonders, all while enjoying warm weather and abundant sunshine.
Sapa
Sapa, a beautiful mountainous town in northern Vietnam, is famous for its stunning landscapes, rich cultural diversity, and cool climate. September is an excellent time to visit as the weather is mild and pleasant, making it ideal for outdoor activities and cultural exploration.
Sapa Weather Overview in September:
- Average Temperature: Around 64°F (18°C).
- Highs: 73°F (23°C).
- Lows: 64°F (18°C).
- Daylight Hours: Approximately 12.5 hours of daylight.
In September, Sapa experiences moderate temperatures, providing a comfortable atmosphere for travelers. While it’s a transitional period between the rainy season and dry season, the weather is generally favorable, with fewer rains compared to earlier months. The average rainfall is about 7.6 inches (192mm), and though there may be occasional showers, they are often light and short-lived, creating a refreshing ambiance.
Why September is a Great Time to Visit Sapa:
- Cool and Comfortable Weather: With daytime highs around 73°F (23°C) and cooler evenings, it’s the perfect escape from the heat of the lowlands.
- Golden Rice Terraces: September marks the beginning of the rice harvest season, and the iconic rice terraces start turning golden, offering breathtaking views and fantastic photo opportunities.
- Cultural Experiences: You can explore local ethnic villages, immerse yourself in their traditions, and take part in the vibrant Mid-Autumn Festival, which adds a lively cultural touch to your visit.
- Scenic Hiking and Trekking: The cooler temperatures are perfect for trekking through the lush valleys, exploring scenic trails, and enjoying the incredible natural beauty of the region.
- Relaxing Stays: Sapa offers a range of comfortable hotels and homestays with picturesque mountain views, making it easy to unwind after a day of adventure.
September is a wonderful time to visit Sapa, as the weather is mild, the rice terraces are golden, and the cultural festivities make it a vibrant and enjoyable destination. Whether you’re hiking, exploring local culture, or simply soaking in the serene views, Sapa offers a memorable experience in September.
Hanoi

Hanoi is one of the best places to visit in Vietnam in September, as you can enjoy the festive atmosphere of the Mid-Autumn Festival.
Hanoi, the vibrant capital of Vietnam, is known for its rich history, charming old quarter, and lively atmosphere. September is a wonderful time to visit, offering warm, pleasant temperatures and a mix of sunshine and occasional refreshing rain showers.
Weather Overview in September:
- Average Temperature: Around 78°F (25.5°C).
- Highs: 90°F (32°C).
- Lows: 78°F (25.5°C).
- Rainfall: 4.1 inches (104mm) with 5 rainy days.
- Daylight Hours: Approximately 12.5 hours of daylight.
In September, Hanoi enjoys warm weather that’s perfect for sightseeing and exploring the city’s vibrant culture. While rainfall is still possible, it’s typically less frequent and intense than in the peak rainy months, providing plenty of opportunities to enjoy outdoor activities.
Why September is a Great Time to Visit Hanoi:
- Pleasant Temperatures: With highs around 90°F (32°C) and cooler evenings, the weather is comfortable for exploring Hanoi’s attractions without the extreme heat of the summer months.
- Ideal for Sightseeing: The city’s landmarks, from the Hoan Kiem Lake to the Old Quarter, are perfect to explore in the mild September weather. The temperature is warm enough for enjoying outdoor cafes and strolling through the scenic streets.
- Cultural Events: September is a great time to experience Hanoi’s unique cultural offerings, including the Mid-Autumn Festival, where you can witness colorful celebrations, lantern displays, and local traditions.
- Rainy Yet Refreshing: Though there are some rainy days in September, the rainfall is generally light and short-lived, refreshing the air and creating a lush, green environment for exploring the city’s parks and lakes.
- Comfortable Stays: Hanoi offers a variety of accommodation options ranging from luxury hotels to charming boutique stays. You can enjoy the cool, comfortable evenings while relaxing in a cozy hotel or a traditional homestay.
The combination of warm, pleasant weather, cultural events, and refreshing rainfall makes it an ideal month to experience the capital’s unique charm. Whether you’re exploring historic sites, attending festivals, or enjoying a peaceful walk around the lakes, Hanoi offers a memorable experience in September.
Ninh Binh
The average maximum daytime temperature in Ninh Binh in September lies at 31.8°C (89.24°F). The average minimum temperature goes down to around 24.6°C (76.28°F) (often the minimum temperature is noted at night). September is part of the rainy season with an average precipitation of 231mm (9.1 inches). There are generally around 14 rainy days.
Ninh Binh, often referred to as “Halong Bay on land,” is a captivating destination in northern Vietnam known for its lush landscapes, dramatic limestone karsts, and peaceful rivers. September is a wonderful time to visit Ninh Binh, offering the perfect combination of warm weather and ample daylight hours for exploration.
Weather Overview in September:
- Average Temperature: Around 77°F (25°C).
- Highs: 88°F (31°C).
- Lows: 77°F (25°C).
- Daylight Hours: Approximately 12.5 hours of daylight.
In September, Ninh Binh enjoys warm but manageable temperatures, with highs around 88°F (31°C) and lows in the upper 70s (around 25°C). The weather is ideal for outdoor activities such as trekking, boat tours, and cycling, especially as the region experiences less rainfall than in the summer months.
Why September is a Great Time to Visit Ninh Binh:
- Comfortable Temperatures: With an average temperature of 77°F (25°C), the weather is warm but not overwhelming, perfect for outdoor exploration and enjoying the region’s natural beauty.
- Scenic Landscapes: The iconic karst mountains, tranquil rivers, and lush rice fields create stunning backdrops. September’s weather allows you to fully enjoy the breathtaking views of Ninh Binh’s landscapes.
- Cultural and Natural Attractions: Explore the Trang An Scenic Landscape Complex, a UNESCO World Heritage Site, or take a boat ride to visit Tam Coc, often referred to as the “Halong Bay of the rice fields.” The weather is perfect for boating through the caves and appreciating the serene surroundings.
- Ideal for Hiking and Cycling: September offers the perfect conditions for outdoor activities like hiking to the top of Mua Cave for panoramic views or cycling through picturesque villages and rice paddies.
- Rich Culture and Heritage: Visit historic sites like Hoa Lu Ancient Capital and the Bich Dong Pagoda, where you can dive into Ninh Binh’s rich cultural history and admire the region’s ancient architecture.
The region’s stunning landscapes, rich culture, and abundant natural beauty make it an unforgettable destination, especially for those looking to escape the crowds and enjoy a peaceful, scenic experience. Whether you’re exploring caves, taking a boat ride, or discovering historical sites, Ninh Binh is sure to offer a memorable adventure in September.
Halong Bay
The average temperature in Halong Bay in September ranges from a high of 86°F (30°C) to a low of 78°F (26°C). The average temperature is 28°C and hardly lower than 22°C. There are some extremely hot days, with the temperature hitting over 30°C. The weather is rather hot in the daytime and cools down at night. September signals the arrival of autumn on Halong Bay and is still in the rainy season. The temperatures and rainfall are on a gradual decline.
Halong Bay, a UNESCO World Heritage Site located in the northeast of Vietnam, is renowned for its breathtaking landscapes, featuring limestone islands, caves, and floating villages. September is an excellent time to visit Halong Bay, as the weather begins to transition into more comfortable temperatures, offering a pleasant experience for travelers.
Weather Overview in September:
- Average Temperature: 27.5°C (82°F).
- Highs: 30.4°C (87°F).
- Lows: 24.8°C (77°F).
- Rainfall: 166.6mm (6.6 inches) with 16 rainy days on average.
In September, Halong Bay enjoys milder and more comfortable weather compared to the summer months. With average temperatures around 27°C (81°F), and highs of 30°C (86°F), the warm but manageable conditions make outdoor exploration and cruises around the bay especially enjoyable. The cooler temperatures create a perfect balance for sightseeing, enjoying the stunning scenery, and engaging in activities without the intense heat of summer.
Why September is a Great Time to Visit Halong Bay:
- Ideal Temperatures: With an average temperature of 27°C (81°F), the weather is warm but not overwhelming, offering a comfortable climate for boat cruises, kayaking, and exploring the islands.
- Stunning Views and Scenic Cruises: The weather conditions are perfect for embarking on a boat cruise to explore Halong Bay’s picturesque limestone islands and caves. The bay’s tranquil waters and towering rock formations are even more impressive with the moderate temperatures in September.
- Fewer Crowds: September falls outside the peak tourist season, meaning you can enjoy Halong Bay’s natural beauty without the usual crowds, offering a more peaceful and relaxed experience.
- Ideal for Outdoor Activities: Whether you want to take a boat ride through the bay, visit Sung Sot Cave, or enjoy a hike on Ti Top Island, September’s pleasant temperatures provide the ideal conditions for outdoor adventures.
- Cultural Experiences: Visit the floating villages, interact with local fishermen, and learn about Halong Bay’s unique way of life while enjoying the beautiful surroundings.
September is a fantastic time to visit Halong Bay. With comfortable temperatures, fewer tourists, and the chance to experience the stunning landscapes and rich culture of this UNESCO World Heritage Site, it’s an ideal destination for those seeking a relaxing yet adventurous getaway. Don’t miss the opportunity to explore Halong Bay in September and create unforgettable memories.
Hoi An
September, the first month of the autumn in Hoi An, is also a hot month, with an average temperature ranging between max 32°C (89°F) and min 24°C (76°F). The total rainfall accumulates to around 329mm and nearly 11 rainy days can be expected in this month.
When researching Hoi An’s weather in September, you may come across warnings about heavy rainfall and unfavorable conditions, often suggesting that this is not the best time to visit. However, this information can be misleading. In reality, September offers a comfortable and moderate climate, making it one of the more pleasant times to visit.
During this month, Hoi An experiences an average high temperature of around 89°F (32°C) and lows of about 76°F (24°C), creating a warm yet comfortable atmosphere. While rain is more frequent, with around 12.9 inches (329mm) of rainfall spread across 11 days, the rain typically comes in the form of scattered showers or light rain rather than prolonged downpours. This gentle rain can add to the charm of the town, enhancing the beauty of its ancient streets and surroundings.
Additionally, September marks a transition from the wet season to the dry season in central Vietnam. Though rain is still possible, especially in the first half of the month, the showers become less frequent as the month progresses. This shift in weather, combined with fewer tourists, makes September a great time to explore Hoi An’s historic architecture, enjoy its cultural heritage, and visit its beaches and countryside without the intense heat of summer or the disruption of heavy rainfall.
With mild temperatures and moderate rainfall, September offers a wonderful opportunity to experience Hoi An in a more relaxed and picturesque setting.
Da Nang
Da Nang is a coastal city in the central region of Vietnam, famous for its long sandy beaches, modern bridges, and historical sites. In September, Da Nang has a hot and humid climate, with an average temperature of 26.9°C (80°F), a high of 29.7°C (85°F) and a low of 24.4°C (76°F).
September is also one of the rainiest months in Da Nang, with an average rainfall of 308.9mm (12.2 inches) and 12.8 rainy days. The rain can be heavy and frequent, especially in the second half of the month, and may cause flooding or landslides in some areas.
September is not the best month to visit Da Nang, as the weather can be unpredictable and affect your travel plans. However, if you don’t mind the rain, you can still enjoy some of the attractions and activities in Da Nang, such as swimming, surfing, parasailing, visiting the Marble Mountains, the Cham Museum, or the Ba Na Hills.
Mekong Delta
The climate of Mekong Delta in September is wet (with 6.5in of rainfall over 13 days). The weather’s not getting better compared to the previous month since in August there is an average of 5.7in of rainfall over 11 days. The climate is good here this month. Temperatures are up to 90°F.
Mekong Delta is a vast region in the south of Vietnam, where the Mekong River splits into nine branches and flows into the sea. It is known for its rich biodiversity, cultural diversity, and agricultural productivity. In September, Mekong Delta has a hot and humid climate, with an average temperature of 28°C (82°F), a high of 31°C (88°F) and a low of 25°C (77°F).
September is also one of the rainiest months in Mekong Delta, with an average rainfall of 165mm (6.5 inches) and 13 rainy days. The rain can be heavy and frequent, especially in the second half of the month, and may cause flooding or landslides in some areas.
September is not the best month to visit Mekong Delta, as the weather can be unpredictable and affect your travel plans. However, if you don’t mind the rain, you can still enjoy some of the attractions and activities in Mekong Delta, such as cruising along the rivers and canals, visiting the floating markets and villages, exploring the fruit orchards and rice fields, or experiencing the local festivals and cuisine.
Ho Chi Minh City
The average temperature in Saigon (Ho Chi Minh City) in September is around 27.7°C (81.86°F) with high temperature of 31 °C (88 °F) and low temperature of 25 °C (77 °F). The majority of days in September receive persistent heavy downpours.
Ho Chi Minh City is the largest and most populous city in Vietnam, located in the south of the country. It is a vibrant and dynamic metropolis with a rich history and culture. In September, Ho Chi Minh City has a hot and humid climate, with an average temperature of 27.7°C (82°F), a high of 31.3°C (88°F) and a low of 24.8°C (77°F). September is also one of the rainiest months in Ho Chi Minh City, with an average rainfall of 213.3mm (8.4 inches) and 16 rainy days. The rain can be heavy and frequent, especially in the afternoon or evening, and may cause flooding or traffic jams in some areas.
September is not the best month to visit Ho Chi Minh City, as the weather can be unpredictable and affect your travel plans. However, if you don’t mind the rain, you can still enjoy some of the attractions and activities in Ho Chi Minh City, such as visiting the War Remnants Museum, the Reunification Palace, the Notre Dame Cathedral, or the Ben Thanh Market.
Phu Quoc
The average temperature in Phu Quoc during September is around 28.2°C (82.76°F). The temperature in September ranges between 27.3°C (81.14°F) and 28.9°C (84.02°F). It is still in the rainy season so the weather of Phu Quoc this time is cool with high humidity of about 85%. The amount of rain is large with an average of 257mm of precipitation and 17 rainy days.

Phu Quoc Island is a great option for beach lovers who want to avoid the rain in Southern Vietnam in September.
Phu Quoc is an island in the south of Vietnam, famous for its pristine beaches, tropical forests, and diverse wildlife. In September, Phu Quoc has a hot and humid climate, with an average temperature of 28.2°C (83°F), a high of 30.8°C (87°F) and a low of 25.8°C (78°F). September is also one of the rainiest months in Phu Quoc, with an average rainfall of 257mm (10.1 inches) and 20.5 rainy days. The rain can be heavy and frequent, especially in the afternoon or evening, and may cause flooding or landslides in some areas.
September is not the best month to visit Phu Quoc, as the weather can be unpredictable and affect your travel plans. However, if you don’t mind the rain, you can still enjoy some of the attractions and activities in Phu Quoc, such as swimming, snorkeling, diving, hiking, or visiting the Phu Quoc National Park or the Vinpearl Safari.
Climate by Region in September
Northern Vietnam
Popular destinations: Hanoi, Halong Bay, Cat Ba, Sapa, Ha Giang, Mu Cang Chai, Ninh Binh, Mai Chau, etc.
September sees the end of summer season for its Northern part although you can still expect plenty of hot weather and rain with the temperature of 28oC on average. When the month comes to the latter end, the temperature starts to drop a little and the rainfall becomes less frequent. The weather in the far North starts to improve for possible trekking options, and the crops are coming near to their harvest season which offer great chance for photographers.
Central Vietnam
Popular destinations: Hoian, Danang, Hue, Nha Trang, Quy Nhon, Dalat, etc.

Central Vietnam experiences heavy rainfall and storms in September, which may affect your sightseeing plans.
The Central region is ready for a change in September when the rainfall is on increase. Temperatures drop a little at average 28oC and stormy weather is a possibility, especially towards the end of the month. Although the region still enjoys some sunny days, beach lovers can have no guarantees of sunshine. Trekking and adventure activities in Dalat and Central Highlands are still unadvisable due to very wet conditions while some of Phong Nha caves are off limits due to flooding.
Southern Vietnam
Popular destinations: Ho Chi Minh City, Phan Thiet & Mui Ne, Mekong Delta, Long Hai & Ho Tram, Con Dao & Phu Quoc, etc.
There are not too much change on the weather of South Vietnam in September in comparison to August although the rainfall is decreasing as the month progresses. The region remains wet with the rainfall could be over 200mm, however, you still expect dry spells and sunny days with the average temperature at 28oC because Ho Chi Minh City can boast up to 11 hours each day with the sun.
Travel Guide for September
In general, Vietnam in September is a great time to visit, as the weather is mild and the scenery is beautiful12.Some of the best destinations to visit in Vietnam in September are:
- Hanoi, where you can enjoy the poetic early autumn and the fragrant milk flowers.
- Ninh Binh, where you can admire the stunning karst landscape and the ancient temples.
- Sapa, where you can trek through the yellow terraced fields and meet the ethnic minorities.
- Mu Cang Chai, where you can witness the harvest festival and the colorful costumes of the locals.
- Hoi An, where you can explore the charming old town and the tranquil river delta.
Blackboard Tree Flowers (or “milk flower” – hoa sua) flourish in September and October so it’s the signal of autumn in Vietnam, especially as an indispensable part in Hanoi’s autumn. The white clusters of flowers look like the tiny white lanterns hidden behind the greenish foliage while its sweet scent intensively spread into small alleys and streets of the capital. If your visit falls into September 2, you will witness the massive celebrations that mark Vietnam on National Independence Day.
Late September can be good time to get viable option for trekking in the mountains of Sapa, Mau Son, and Mu Cang Chai, as sunny days become the norm. Besides, this is a picturesque time of year to visit Mu Cang Chai as the region’s endless rice fields turn a golden color, ready to harvest.

Paragliding on Mu Cang Chai in the harvest season
Read more about Mu Cang Chai: https://vietnamtravel.com/mu-cang-chai-overview/
Visiting Ninh Binh which resembles Ha Long Bay, but on land. There are many famous and fascinating sites in the area that worthy your visit here, including the Gothic Phat Diem Cathedral; Bai Dinh pagoda; or explore the rice paddies and cave-riddled mountains of Trang An and Tam Coc by rowing boat.
Read more about:
Tam Coc – Bich Dong: https://vietnamtravel.com/tam-coc-bich-dong/
Trang An Complex: https://vietnamtravel.com/trang-an-scenic-landscape-complex/
Northern Central Vietnam including Hue, Hoian generally get more rains than Nha Trang and south Central Vietnam, which sees more dry, sunny days. If wet conditions cannot put you off visiting, this region is absolutely worthy on your travel list in September.
Floating water season from September to November gives the Southwest of Vietnam many chances to contemplate the beautiful sceneries. It will be great for rowing a boat and enjoy the beautiful lotus field in Thap Muoi which is located away from Ho Chi Minh around 130 kilometers in the South; or admire the beauty of Tra Su Cajuput Forest (An Giang) which is also a must-visited destination during this time.
This is also a good month to explore the Mekong Delta because the waterfront and water-borne life is at its most active and locally grown fruits, such as dragon fruit and mango, are at their prime.
When traveling to Vietnam in September, some thin and breathable clothes like short shirt, thin skirts and shorts as well as sunscreen will work. You can also bring a long dress or long sleeve T shirt in case of the temperature drops at night. Raingear is necessary to prepare for this month to avoid any wetness.
Dress code for cultural or spiritual places are still required at formal ones to express your respects.
As September is still off season, you can enjoy exploring without the crowds, and tourist prices are generally at their lowest.
September Events
National Independence Day Celebration (nationwide).
This is one of the most significant holidays in Vietnam, marking the day of 2 September 1945 when the revolutionary leader Ho Chi Minh declared Vietnam’s independence from France at Ba Dinh Square. When the holiday comes, every Vietnamese citizen both living in or outside Vietnam are celebrating this day with flags, cheerful festivities and fireworks at night. Remember to head out into the streets to join the locals in an exuberant celebration of Vietnamese patriotism and pride.
Keo Pagoda Festival (Thai Binh)
Nestled on Duy Nhat Commune, Vu Thu District, Thai Binh Province, Keo Pagoda is one of the most unique and spectacular structures of Vietnam which is recognized as a Special National Monument. The Keo Pagoda festival is held twice per year in the spring on the fourth day of the first lunar month, and in the autumn from the 13th to the 15th day of the ninth lunar month, to commemorate Ly Quoc Su-Priest Khong Lo. Autumn festival (September-October according to solar calendar) will include palanquin procession, incense offerings, swimming race and traditional dances.
Do Son Buffalo Fighting Festival (Hai Phong)
This festival has been long conducted within the region since the 18th century and annually operated on the 9th day of the 8th month in lunar calendar (August-September, varying by year).
Not only associating with Water Goddess worshiping and sacrificing customs, the festival also expresses the bravery and chivalry of people in the coastal city of Hai Phong.
Kate Festival (Ninh Thuan)
Kate Festival is held in Ninh Thuan Province in 9th month of lunar calendar (September – October, varying by the year). This is also called Mbang Kate which is the most unique festival of the Cham people to commemorate the merits of gods and also national heroes such as Po Klong Garai, Po Rome, … This is the place to show the characteristics of culture, activities, customs, beliefs, techniques, arts, and customs through sacrifices, costumes, musical instruments, hymns as well as praising farming, crops, flourishing, traditional products and trades …On this occasion, the local people can relax, meet and wish one another fortune in the future.
Please check information about Vietnam weather in other months of year at here:
- https://vietnamtravel.com/vietnam-weather/
- https://vietnamtravel.com/vietnam-weather-in-january/
- https://vietnamtravel.com/vietnam-weather-in-february/
- https://vietnamtravel.com/weather-of-march-in-vietnam/
- https://vietnamtravel.com/vietnam-weather-in-april/
- https://vietnamtravel.com/vietnam-weather-in-may/
- https://vietnamtravel.com/vietnam-weather-in-june/
- https://vietnamtravel.com/vietnam-weather-in-july/
- https://vietnamtravel.com/vietnam-weather-in-august/
- https://vietnamtravel.com/vietnam-weather-in-october/
- https://vietnamtravel.com/vietnam-weather-in-november/
- https://vietnamtravel.com/vietnam-weather-in-december/