VietnamAverage weather for Halong Bay in September
It's hot in September in Halong Bay with an average temperature of 32°C. Temperatures this month range from a low of 31°C to a high of 34°C. At night, you can expect temperatures between 26°C and 27°C.
Start of September
The month of September starts in Halong Bay with hot temps, averaging around 33°C during the day and nights around 27°C. There are plenty of days with a good chance of precipitation. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid September
By mid-September, daytime temps drop to around 32°C, with nights around 27°C. There’s a high chance of precipitation during this time. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
End of September
By the end of September, the average daytime temperature in Halong Bay is around 32°C, while nighttime temps are about 26°C. There’s a significant chance of many days with precipitation. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
In September, there is an average of 302 mm of precipitation, spread over 20 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Halong Bay in September |
New York | ||
|---|---|---|---|
 Average temperature |
32°C | 27°C | |
 Max. temperature |
34°C | 31°C | |
| Min. temperature |
31°C | -5°C | |
 Total precipitation |
302 mm | 57 mm | |
| Rainy days |
20 days | 9 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Halong Bay?
Looking for sun? September isn’t a good month to be in Halong Bay. The temperature is nice, but there’s too much chance of rain.
The typhoon season in Halong Bay runs from June to November.
Temperature records
With 37°C in 2023, Halong Bay reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 26°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 21°C to a highest value of 30°C.
Check out the climate of Halong Bay for all months and discover the best travel time
Curious about the weather in other parts of Vietnam? Check out the climate and weather for spots like Hanoi, Ho Chi Minh City, Hội An, or explore other destinations in Vietnam.
Daily Temperature in September in Halong Bay
This chart shows the average daily high and low temperatures in September for Halong Bay, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Halong Bay
The chart below shows the average daily precipitation in September for Halong Bay, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 20 days of precipitation in Halong Bay.
Daily UV index in September in Halong Bay
This chart shows the average daily UV index in September in Halong Bay, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Halong Bay over the years
This chart shows the average temperature in September in Halong Bay, measured in degrees Celsius, over the past few years.
Total precipitation in September in Halong Bay over the years
This chart shows the average precipitation in September in Halong Bay, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Halong Bay
Click on any day in September to get detailed info about the usual weather on that day in Halong Bay. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Halong Bay
Have you been to Halong Bay in September?
Share your weather experience in September in Halong Bay.
Average weather in Halong Bay by month
Click on a month below to see detailed weather info for Halong Bay. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Halong Bay for all months at once
