Nam Phong Weather in September
What's the weather like in Nam Phong (Khon Kaen) in September 2025?
The climate in Nam Phong during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Nam Phong and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (88°F), whilst at night 24°C (75°F) is normal.
| Daytime temperature | 31.3°C 88.3°F |
|---|---|
| Nightly temperature | 23.7°C 74.7°F |
| Average temperature | 27.5°C 81.5°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 245 mm 9.6 ins |
| Rainy days | 18 days |
| Sea temperature | 29°C 84.1°F |
| Humidity | 82% |
| Windspeed | 2.9kph 2 mph |
On average September is the wettest month of the year in Nam Phong with around 245mm 9.6 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 6 hours of sunshine per day.
September temperatures in Nam Phong
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 Nam Phong in September 2025.
Other monthly averages
Best places to visit in September
Nam Phong weather stats
| Hottest month: | April | 35.6°C 96.1°F |
|---|---|---|
| Driest month: | December | 3mm 0.1ins |
| Sunniest month: | January | 9.7hrs |
| Coldest month: | December | 28.9°C 84°F |
| Wettest month: | September | 245mm 9.6ins |
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