The climate in Kham Muang during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Kham Muang 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 | 31.1°C 87.9°F | 
|---|---|
| Nightly temperature | 23.8°C 74.8°F | 
| Average temperature | 27.4°C 81.3°F | 
| Daily sunshine | 6 hrs | 
| Avg rainfall | 250 mm 9.8 ins | 
| Rainy days | 18 days | 
| Sea temperature | 29°C 84.3°F | 
| Humidity | 82% | 
| Windspeed | 3.2kph 2 mph | 
On average September is the 2nd wettest month of the year in Kham Muang with around 250mm 9.8 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.
				
						
						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 Kham Muang in September 2025.
Best places to visit in September
| Hottest month: | April | 34.9°C 94.8°F | 
|---|---|---|
| Driest month: | December | 2mm 0.1ins | 
| Sunniest month: | January | 9.8hrs | 
| Coldest month: | December | 28.4°C 83.1°F | 
| Wettest month: | August | 301mm 11.9ins |