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Weather in Hạ Long for September 2025

Your guide to Hạ Long weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Hạ Long has been nearly identical to the historical average, with a temperature of 29.8 °C (showing only a slight deviation of -0.4 °C).

  • The forecast for the next days in Hạ Long predicts temperatures to be around 31 °C, close to the historical average.

  • In general, the average temperature in Hạ Long at the beginning of September is 31 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 30.4 °C by the end of September.

    • Rain 🌧️

  • Hạ Long experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 647.8 mm.

Average dry days
6
Dry days
Average rainy days
24
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/26°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Hạ Long Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy light rain with thunder
30°
2
Patchy light rain with thunder
30°
3
Patchy rain possible
31°
4
Partly cloudy
31°
5
Patchy light drizzle
32°
6
Thundery outbreaks possible
33°
7
Light rain shower
30°
8
Patchy light rain with thunder
31°
9
Moderate or heavy rain shower
28°
10
Torrential rain shower
28°
11
Torrential rain shower
28°
12
Light rain shower
30°
13
Cloudy
30°
14
Light rain shower
30°
15
Patchy rain possible
30°
16
Patchy rain possible
32°
17
Patchy rain possible
28°
18
Moderate rain
31°
19
Moderate rain
32°
20
Patchy rain possible
32°
21
Patchy rain possible
31°
22
Patchy rain possible
32°
23
Patchy rain possible
29°
24
Partly cloudy
32°
25
Sunny
31°
26
Partly cloudy
31°
27
Partly cloudy
30°
28
Partly cloudy
29°
29
Partly cloudy
31°
30
Light rain shower
29°

Temperatures trend during September in Hạ Long

See the weather trend as well as the moving average line

September weather in Hạ Long day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 30° /26° 4.3 mm 7
2 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 30° /26° 6.6 mm 7
3 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 3.2 mm 7
4 Sept. Partly cloudy
Partly cloudy
 31° /27° 0.3 mm 8
5 Sept. Patchy light drizzle
Patchy light drizzle
 32° /26° 0.1 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 33° /27° 1.7 mm 8
7 Sept. Light rain shower
Light rain shower
 30° /25° 96.7 mm 7
8 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 31° /26° 22 mm 7
9 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /25° 30 mm 6
10 Sept. Torrential rain shower
Torrential rain shower
 28° /24° 88.5 mm 6
11 Sept. Torrential rain shower
Torrential rain shower
 28° /25° 64.4 mm 7
12 Sept. Light rain shower
Light rain shower
 30° /26° 5.7 mm 7
13 Sept. Cloudy
Cloudy
 30° /25° 2.1 mm 7
14 Sept. Light rain shower
Light rain shower
 30° /26° 3.6 mm 7
15 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 1.6 mm 7
16 Sept. Patchy rain possible
Patchy rain possible
 32° /25° 3.1 mm 2.5
17 Sept. Patchy rain possible
Patchy rain possible
 28° /25° 5 mm 1
18 Sept. Moderate rain
Moderate rain
 31° /24° 12.6 mm 2.2
19 Sept. Moderate rain
Moderate rain
 32° /25° 6.1 mm 2.8
20 Sept. Patchy rain possible
Patchy rain possible
 32° /25° 2.8 mm 6
21 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 1.5 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
 32° /25° 1.7 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 2.1 mm 6
24 Sept. Partly cloudy
Partly cloudy
 32° /23° 0 mm 7
25 Sept. Sunny
Sunny
 31° /24° 0 mm 7
26 Sept. Partly cloudy
Partly cloudy
 31° /24° 0 mm 7
27 Sept. Partly cloudy
Partly cloudy
 30° /23° 0 mm 7
28 Sept. Partly cloudy
Partly cloudy
 29° /22° 0 mm 6
29 Sept. Partly cloudy
Partly cloudy
 31° /23° 0 mm 7
30 Sept. Light rain shower
Light rain shower
 29° /27° 8.3 mm 6
Next
Important Notice
Our weather forecast for Hạ Long in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Hạ Long forecast closer to your planned date for the most up-to-date weather information.
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Hạ Long in September - FAQ

What are the expected maximum and minimum temperatures in Hạ Long during September?
During September, expect a variety of temperatures with highs around 29° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hạ Long during September?
Significant rainfall exceeding 647.8 mm is expected in Hạ Long during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hạ Long during September?
The average wind speed in Hạ Long during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Hạ Long

Explore the daily rainfall trends and prepare for Hạ Longs September weather 💧

UV exposure in Hạ Long during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Hạ Long?

Get accurate weather forecasts for Hạ Long, located at latitude 20.95 and longitude 107.073. Stay updated with localized weather information tailored for Hạ Long.

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