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VietnamThe weather in September in Halong Bay
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.
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.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Halong Bay, Vietnam. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
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.
Rainfall amount
In September, there is an average of 302 mm of precipitation, spread over 26 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
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.
September weather comparison
| Halong Bay | New York | |
|---|---|---|
| Average temperature | 32°C | 27°C |
| Max. temperature | 34°C | 31°C |
| Min. temperature | 26°C | -5°C |
| Total precipitation | 302 mm | 57 mm |
| Rainy days | 26 days | 9 days |
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.
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.
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.
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.
The typhoon season in Halong Bay runs from June to November.
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.
Temperature charts
These charts show the average temperatures in September in Halong Bay, Vietnam. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Halong Bay
Temperature in September in Halong Bay over the years
Precipitation charts
These charts show the average amount of precipitation in September in Halong Bay, Vietnam. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Halong Bay
Total precipitation in September in Halong Bay over the years
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.
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.