O'Fallon Weather in May

What's the weather like in O'Fallon (Missouri) in May 2024?

The climate in O'Fallon during May can be summarized as warm and damp.

May is in the spring in O'Fallon and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 12°C (54°F) is normal.

O'Fallon weather averages (imperial / metric)
Daytime temperature 24.2°C 75.5°F
Nightly temperature 12.1°C 53.7°F
Average temperature 18.1°C 64.6°F
Daily sunshine 9.3 hrs
Avg rainfall 106 mm 4.2 ins
Rainy days 11 days
Sea temperature 14°C 57.1°F
Humidity 68%
Windspeed 16.6kph 10 mph

On average May is the wettest month of the year in O'Fallon with around 106mm 4.2 inches of rain making it a damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.3 hours of sunshine per day.

May temperatures in O'Fallon

O'Fallon average temperature in May

May rainfall

O'Fallon average rain in May

May hourly sunshine

O'Fallon average rain in May

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 O'Fallon in May 2024.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

O'Fallon weather stats

O'Fallon weather statistics
Hottest month: July 31.3°C 88.3°F
Driest month: January 43mm 1.7ins
Sunniest month: July 10.7hrs
Coldest month: January 2.7°C 36.9°F
Wettest month: May 106mm 4.2ins
Map showing location of O'Fallon (38.81061, -90.69985) O'Fallon map pin © Google

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