Halong Bay in september: average Weather, Temperature and Climate
Weather in Halong Bay in september 2025
The weather in Halong Bay in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 7
Weather at 6am
79°F
Clear/Sunny
30% of time
27%
23%
14%
Weather at 12pm
88°F
Clear/Sunny
30% of time
28%
22%
18%
Weather at 6pm
81°F
Clear/Sunny
38% of time
28%
16%
14%
Weather at 3am
79°F
31%
30%
19%
14%
Evolution of daily average temperature and precipitation in Halong Bay in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Halong Bay in september.
The climate of Halong Bay in september is tolerable
The climate in september in Halong Bay is wet (with 11.7in of precipitation over 12 days). The weather is better from the previous month since in august it receives an average of 21.8in of rainfall over 20 days.
The climate is very hot in this location this month. The thermometer averaged maximum of 88°F. The seasonal minimum is 79°F. Thus, the mean temperature average on this month of september in Halong Bay is 85°F. Note that these seasonal averages are in contrast with those observed in Halong Bay in september with a maximum record of 97°F in 2021 and a minimum record of 68°F in 2011. You can expect to have 86°F or more for all the month.
On this month of september, day length in Halong Bay is generally 12:16. The sun rises at 05:39 and sunset is at 17:55.
With a correct weather, the month of september is okay (but not the best) to go in this locality.
Halong Bay: another month?
If you can push back the dates of your trip, we advise you to go in october to Halong Bay. more information
September: another location in Vietnam?
If you want to go to Vietnam in september, there are destinations with better weather than Halong Bay:
In september, Hanoi, Phan Thiet, Bac Ha, Co Thach Beach (Bình Thạnh), Mũi Né and Thanh Pho Ninh Binh have good weather.
Seasonal average climate and temperature of Halong Bay in september
Check below seasonal norms These datas are compiled from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 88°F | ||||
| Lowest temperature | 79°F | ||||
| Highest record temperature | 97°F (2021) | ||||
| Lowest record temperature | 68°F (2011) | ||||
| Number of days at +86°F | 23 day(s) (77%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 84°F | ||||
| Lowest sea temperature | 81°F | ||||
| Highest sea temperature | 87°F | ||||
| Wind | |||||
| Wind speed | 13km/h | ||||
| Wind temperature | 79°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 11.7in | ||||
| Number of days with rainfall | 12 day(s) (42%) | ||||
| Record daily rainfall | 5.1in (2014) | ||||
| Other climate data | |||||
| Humidity | 85% | ||||
| Visibility | 9.14km | ||||
| Cloud cover | 37% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:39 | ||||
| Time of sunset | 17:55 | ||||
| Length of day | 12:16 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Halong Bay in september 2024:
81°F to 88°F
81°F to 88°F
81°F to 90°F
81°F to 90°F
81°F to 94°F
83°F to 95°F
77°F to 83°F
81°F to 83°F
79°F to 81°F
77°F to 79°F
77°F to 79°F
77°F to 86°F
77°F to 88°F
79°F to 86°F
79°F to 86°F
79°F to 88°F
79°F to 88°F
77°F to 88°F
79°F to 83°F
79°F to 86°F
79°F to 86°F
77°F to 83°F
76°F to 83°F
72°F to 74°F
74°F to 81°F
74°F to 83°F
77°F to 85°F
79°F to 85°F
81°F to 86°F
79°F to 85°F
Map: other cities in Vietnam in september
Cities near Halong Bay:
| Cat Ba island in september | tolerable weather |
| Hải Phòng in september | tolerable weather |
| Do Son Beach (Vạn Hương) in september | tolerable weather |
| Lạng Sơn in september | tolerable weather |
| Hanoi in september | good weather |
| Thanh Pho Ninh Binh in september | good weather |
| Thanh Pho Thai Nguyen in september | tolerable weather |
| Viet Tri in september | tolerable weather |
| Thanh Pho Hoa Binh in september | tolerable weather |
| Thanh Hóa in september | tolerable weather |
| Thanh Pho Cao Bang in september | tolerable weather |
| Mai Chau in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Halong Bay
perfect weather
good
tolerable
bad
very bad
Weather data for Halong Bay in september:
Weather data for Halong Bay for september are derived from an average of the weather forecast since 2009 in Halong Bay. There is a margin of error and these forecasts are to be considered as general information only. The weather in Halong Bay can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Halong Bay.