Is the weather good in Vietnam in September 2025?
For the past few decades, the average daily temperatures in Vietnam during September have been around +31°C.
In Vietnam the temperature rarely varies more than seven degrees between the different parts with the highest temperature +31°C in Hanoi to +28°C in Phu Quoc. So you should be able to pack for similar conditions wherever you go in the country.
Temperature, wind and humidity in September
- rainiest? Phu Quoc, with an average of 13 mm of rain and humidity of 85%;
- warmest? Hanoi, with daytime temperatures averaging +32°C;
- windiest? Phu Quoc, with an average of 4 m/s;
- coolest? Phu Quoc, with daytime temperatures averaging +28°C;
How good is the weather in Vietnam in September?
How warm is it in Vietnam during September?
This is how hot it usually is in September
- Average maximum temperature for the month: +30°C;
- Average minimum temperature for the month: +26°C;
- Highest monthly temperature: +31°C;
- Lowest monthly temperature: +25°C;
Monthly temperatures:
- Warmest: June with an average +32°C during the day;
- Coldest: January with an average +26°C of the day;
- Hottest month in hottest city: March in Ho Chi Minh City;
- Coldest month in coolest city: January in Dong Hoi;
Can you swim in Vietnam in September?
Winds in Vietnam during September
September tends to offer light winds averaging 2 m/s. However, coastal cities may experience breezes during the mornings and afternoons.
Comparison between cities in September:
- Highest average wind speed: Phu Quoc with 3 m/s;
- Lowest average wind speed: Da Nang with 1 m/s;
- Windiest day of the month: Phu Quoc with 4 m/s;
- The least windy day of the month: Nha Trang with 0 m/s;
Humidity and precipitation in Vietnam in September
Comparison between cities in September:
- Highest average rainfall: Phu Quoc with 399 mm;
- Lowest average rainfall: Hanoi with 229 mm;
- Most number of rainy days: Phu Quoc with 24 rainy days;
- Least number of rainy days: Ho Chi Minh City with 14 rainy days;
- Highest risk of rain during the day: Phu Quoc with 80%;
- Least risk of rain during the day: Ho Chi Minh City with 47%;
- Highest average humidity: Phu Quoc with 85%;
- Lowest average humidity: Da Nang with 82%;
Tips for traveling to Vietnam in September
Looking for some tips for traveling to the sun, snow, or whatever you're aiming for Vietnam? Activities, weather, and clothing are closely linked. In addition, it's important to pack only what you really need so you don't have to worry about heavy packing or paying extra baggage fees.
Here is some advice on what to pack and what kind of activities you can do in the Vietnam based on the weather that September is expected to bring. The advice applies to the country as a whole – local weather and possible activities may differ somewhat.
Pack right for September
- For light showers, an umbrella or a thin and light rain cape is usually sufficient, while more rain may require rainwear and rain boots.
- Warm - neither hot nor cool, are probably the most comfortable when you think of sunbathing. Shorts, shorter skirts or dresses, tank tops and t-shirts are the basics here. If you're going to a seaside resort, don't forget your swimwear and maybe even a snorkel, mask and flippers.
- Light winds are probably most comfortable in hot weather but is cooling in cool and cold weather. If it is hot (when the air temperature is about 30 degrees), the wind can have a warming effect. A thin, windproof jacket and long trousers help to counteract these effects.
- High humidity means that the air conducts heat to and from the skin more easily. For example, if the air is hot (above skin temperature), it will be harder to stay cool. On the other hand, if the air is cool or cold, it is more difficult to stay warm. In high humidity, the choice of clothing makes less of a difference. However, your physical activity plays a bigger role.
FAQ
What can you do outside when it's warm in Vietnam?
Is September a good time to visit Vietnam?
Monthly weather in Vietnam
Source of the data
For this page, we’ve looked at the typical weather in Vietnam, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.