The climate in Kemah during September can be summarized as mild and dry.
September is in the fall / autumn in Kemah and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 9°C (49°F) is normal.
Daytime temperature | 24.3°C 75.7°F |
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Nightly temperature | 9.2°C 48.5°F |
Average temperature | 16.7°C 62.1°F |
Daily sunshine | 11 hrs |
Avg rainfall | 11 mm 0.4 ins |
Rainy days | 4 days |
Sea temperature | 24.9°C 76.8°F |
Humidity | 46% |
Windspeed | 6.1kph 4 mph |
On average September is the 3rd driest month of the year in Kemah with around 11mm 0.4 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.
On the flip side this corresponds to an average of 11 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 Kemah in September 2025.
Best places to visit in September
Hottest month: | July | 27.6°C 81.7°F |
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Driest month: | August | 4mm 0.2ins |
Sunniest month: | July | 13.9hrs |
Coldest month: | January | -0.7°C 30.7°F |
Wettest month: | April | 84mm 3.3ins |