Wiang Pa Pao Weather in September
What's the weather like in Wiang Pa Pao (Chiang Rai) in September 2025?
The climate in Wiang Pa Pao during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Wiang Pa Pao and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 21°C (69°F) is normal.
| Daytime temperature | 29.1°C 84.4°F |
|---|---|
| Nightly temperature | 20.7°C 69.3°F |
| Average temperature | 24.9°C 76.8°F |
| Daily sunshine | 5.9 hrs |
| Avg rainfall | 240 mm 9.5 ins |
| Rainy days | 18 days |
| Sea temperature | 29.1°C 84.3°F |
| Humidity | 82% |
| Windspeed | 2.9kph 2 mph |
On average September is the 2nd wettest month of the year in Wiang Pa Pao with around 240mm 9.5 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.9 hours of sunshine per day.
September temperatures in Wiang Pa Pao
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Wiang Pa Pao in September 2025.
Other monthly averages
Best places to visit in September
Wiang Pa Pao weather stats
| Hottest month: | April | 33.5°C 92.3°F |
|---|---|---|
| Driest month: | February | 9mm 0.4ins |
| Sunniest month: | February | 10.1hrs |
| Coldest month: | December | 25.1°C 77.2°F |
| Wettest month: | August | 318mm 12.5ins |
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