Chiang Mai
September
Weather in Chiang Mai for September 2026
Your guide to Chiang Mai weather in September - trends and predictions
In general, the average temperature in Chiang Mai at the beginning of September is 30.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 29 °C by the end of September.
Chiang Mai experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 1745.9 mm.
Is September a good time to visit Chiang Mai? check out the best time to travel to Chiang Mai page.
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Temperatures
Rain 🌧️
More
0
Dry days
30
Rainy days
0
Snow days
32°/21°
Temperatures
6 km/h
Avg max wind
88 %
Avg humidity
Chiang Mai Weather September
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Temperatures trend during September in Chiang Mai
See the weather trend as well as the moving average line
September weather in Chiang Mai day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 30° /22° | 12.1 mm | 7 | |
| 2 Sept. | Light rain shower | 31° /21° | 11 mm | 7 | |
| 3 Sept. |  Moderate rain at times | 32° /22° | 4.7 mm | 7 | |
| 4 Sept. | Light rain shower | 32° /22° | 6.5 mm | 7 | |
| 5 Sept. |  Patchy light rain with thunder | 31° /22° | 13.9 mm | 7 | |
| 6 Sept. | Moderate rain at times | 29° /21° | 12 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 31° /21° | 14.1 mm | 7 | |
| 8 Sept. | Moderate or heavy rain shower | 31° /21° | 14.1 mm | 7 | |
| 9 Sept. | Moderate or heavy rain shower | 28° /21° | 28.2 mm | 6 | |
| 10 Sept. | Light rain shower | 28° /21° | 12.5 mm | 6 | |
| 11 Sept. | Light rain shower | 27° /21° | 14.5 mm | 6 | |
| 12 Sept. | Patchy rain possible | 29° /20° | 2 mm | 6 | |
| 13 Sept. | Patchy rain possible | 31° /21° | 3.5 mm | 7 | |
| 14 Sept. | Moderate or heavy rain shower | 29° /21° | 9.4 mm | 6 | |
| 15 Sept. |  Heavy rain at times | 29° /21° | 7.6 mm | 6 | |
| 16 Sept. | Light rain shower | 30° /21° | 9.4 mm | 6 | |
| 17 Sept. | Light rain shower | 29° /21° | 6 mm | 6 | |
| 18 Sept. | Light rain shower | 29° /21° | 9.3 mm | 6 | |
| 19 Sept. | Patchy light rain with thunder | 30° /21° | 5.8 mm | 6 | |
| 20 Sept. | Light rain shower | 29° /21° | 6.6 mm | 6 | |
| 21 Sept. | Moderate or heavy rain shower | 31° /21° | 8.3 mm | 7 | |
| 22 Sept. | Moderate or heavy rain shower | 31° /21° | 12.5 mm | 7 | |
| 23 Sept. | Moderate or heavy rain shower | 28° /21° | 19.1 mm | 6 | |
| 24 Sept. | Moderate rain at times | 28° /21° | 14.1 mm | 6 | |
| 25 Sept. | Moderate or heavy rain shower | 29° /21° | 22.9 mm | 6 | |
| 26 Sept. | Light rain shower | 29° /21° | 15.1 mm | 6 | |
| 27 Sept. | Light rain shower | 29° /21° | 13 mm | 6 | |
| 28 Sept. | Light rain shower | 30° /21° | 9.3 mm | 7 | |
| 29 Sept. | Patchy light rain with thunder | 30° /21° | 21.3 mm | 6 | |
| 30 Sept. | Light rain shower | 28° /21° | 10.7 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Chiang Mai 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 Chiang Mai forecast closer to your planned date for the most up-to-date weather information.
Change Month
Chiang Mai weather in September vs August vs October
Compare September weather in Chiang Mai with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Moderate or heavy rain shower | Patchy rain possible |
| Temperatures | 32°/21° | 32°/21° | 31°/20° |
| Rainfall | 1245 mm | 1746 mm | 1263 mm |
| Wind | 5.5 km/h | 5.5 km/h | 5.1 km/h |
| Humidity | 87% | 88% | 86% |
| Rainy days | 31 days | 30 days | 30 days |
| Dry days | 0 days | 0 days | 1 days |
Planning a trip to Chiang Mai? Discover the best time to visit
Chiang Mai in September - FAQ
What are the expected maximum and minimum temperatures in Chiang Mai during September?
During September, expect a variety of temperatures with highs around 32° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in Chiang Mai during September?
Significant rainfall exceeding 1745.9 mm is expected in Chiang Mai during September, occurring over more than 30 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Chiang Mai during September?
The average wind speed in Chiang Mai during September is 6 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Chiang Mai in September?
As you prepare for your trip to Chiang Mai in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Chiang Mai, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
- Insect Repellent: For destinations with mosquitos or other insects
September rainfall patterns in Chiang Mai
Explore the daily rainfall trends and prepare for Chiang Mais September weather 💧
UV exposure in Chiang Mai during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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