Today's Weather in O'Fallon

Wed 17th, Sep

24°C 75°F
Feels like: -5°C 24°F
Clear sky night
Southeast
7km/h 5mph / SE
Gust: 4 km/h
Gust: 4 mph
  • Rain: 0 mm
  • Sun: 3 mins
  • Cloud: %
  • RH: 42.7%
  • Pressure: 0 mb
  • Visibility: 24135 m
Sunrise: 06:46
Sunset: 19:07

O'Fallon 24hr weather forecast

03:00 06:00 09:00 12:00 15:00 18:00 21:00 00:00
Clear sky night
24°C
5 mph 		Partly cloudy night
22°C
2 mph 		Partly cloudy night
19°C
2 mph 		White cloud
18°C
2 mph 		White cloud
29°C
5 mph 		White cloud
33°C
5 mph 		White cloud
34°C
5 mph 		Partly cloudy night
28°C
5 mph
15 day O'Fallon forecast »

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O'Fallon average weather Wednesday 17th September 2025 11:20 PM
Max temp: 24°C 75.2°F
Min temp: 11.7°C 53°F
Rainfall: 3mm 0.1ins

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