The climate in Mount Vernon during September can be summarized as warm, humid and damp.
September is in the fall / autumn in Mount Vernon and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (81°F), whilst at night 15°C (58°F) is normal.
Daytime temperature | 27.1°C 80.8°F |
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Nightly temperature | 14.5°C 58.1°F |
Average temperature | 20.8°C 69.4°F |
Daily sunshine | 8.4 hrs |
Avg rainfall | 116 mm 4.6 ins |
Rainy days | 9 days |
Sea temperature | 21.7°C 71°F |
Humidity | 73% |
Windspeed | 14.4kph 9 mph |
On average September is the 3rd wettest month of the year in Mount Vernon with around 116mm 4.6 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.4 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 Mount Vernon in September 2024.
Best places to visit in September
Hottest month: | July | 31.9°C 89.4°F |
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Driest month: | January | 45mm 1.8ins |
Sunniest month: | July | 11.1hrs |
Coldest month: | January | 5.7°C 42.3°F |
Wettest month: | June | 125mm 4.9ins |