Hạ Long
September
Weather in Hạ Long for September 2025
Your guide to Hạ Long weather in September - trends and predictions
In general, the average temperature in Hạ Long at the beginning of September is 31.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.7 °C by the end of September.
Hạ Long experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 647.8 mm.
Temperatures
Rain 🌧️
6
Dry days
24
Rainy days
0
Snow days
29°/26°
Temperatures
19 km/h
Avg max wind
80 %
Avg humidity
Hạ Long in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2 31° | 3  31° | 4  32° | 5  34° | 6  35° | 7 29° |
| 8 29° | 9  28° | 10  26° | 11 25° | 12 29° | 13  30° | 14 30° |
| 15 30° | 16 30° | 17 30° | 18 30° | 19 28° | 20 30° | 21 30° |
| 22 26° | 23  28° | 24 23° | 25 27° | 26 28° | 27 29° | 28 29° |
| 29 29° | 30 29° |
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Temperatures trend during September in Hạ Long
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Patchy light rain with thunder | 31° /27° | 2.9 mm | 7 | |
| 2 Sept. | Patchy light rain with thunder | 31° /27° | 3 mm | 7 | |
| 3 Sept. | Patchy rain possible | 31° /27° | 5.7 mm | 7 | |
| 4 Sept. | Partly cloudy | 32° /27° | 0.6 mm | 8 | |
| 5 Sept. | Patchy light drizzle | 34° /27° | 0.2 mm | 7 | |
| 6 Sept. | Thundery outbreaks possible | 35° /28° | 0.1 mm | 8 | |
| 7 Sept. | Light rain shower | 29° /24° | 193.2 mm | 6 | |
| 8 Sept. | Patchy light rain with thunder | 29° /27° | 39.9 mm | 6 | |
| 9 Sept. | Moderate or heavy rain shower | 28° /26° | 38.4 mm | 6 | |
| 10 Sept. | Torrential rain shower | 26° /24° | 134.8 mm | 6 | |
| 11 Sept. | Torrential rain shower | 25° /24° | 95.8 mm | 6 | |
| 12 Sept. | Light rain shower | 29° /25° | 9.7 mm | 6 | |
| 13 Sept. | Cloudy | 30° /25° | 2.7 mm | 7 | |
| 14 Sept. | Light rain shower | 30° /26° | 2.3 mm | 7 | |
| 15 Sept. | Patchy rain possible | 30° /26° | 1.6 mm | 7 | |
| 16 Sept. | Patchy rain possible | 30° /26° | 6.1 mm | 7 | |
| 17 Sept. | Light rain shower | 30° /26° | 8.3 mm | 7 | |
| 18 Sept. | Moderate or heavy rain shower | 30° /25° | 15.9 mm | 7 | |
| 19 Sept. | Light rain shower | 28° /26° | 4.9 mm | 6 | |
| 20 Sept. | Light rain shower | 30° /26° | 6.6 mm | 7 | |
| 21 Sept. | Light rain shower | 30° /25° | 13.6 mm | 7 | |
| 22 Sept. | Light rain shower | 26° /25° | 39.2 mm | 6 | |
| 23 Sept. | Overcast | 28° /24° | 0 mm | 6 | |
| 24 Sept. | Light drizzle | 23° /21° | 2.3 mm | 5 | |
| 25 Sept. | Patchy rain possible | 27° /23° | 0.1 mm | 6 | |
| 26 Sept. | Patchy rain possible | 28° /24° | 0.1 mm | 6 | |
| 27 Sept. | Light rain shower | 29° /25° | 1 mm | 6 | |
| 28 Sept. | Light rain shower | 29° /27° | 1.7 mm | 6 | |
| 29 Sept. | Light rain shower | 29° /27° | 8.8 mm | 6 | |
| 30 Sept. | Light rain shower | 29° /27° | 8.3 mm | 6 | |
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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.
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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