O'Fallon Weather Forecast
- 64
- 83
Rain Showers Likely
- 56
- 77
Chance Rain Showers
- 54
- 77
Partly Sunny
- 62
- 80
Partly Sunny
- 66
- 86
Mostly Sunny
- 70
- 91
Mostly Sunny
- 68
- 92
Mostly Sunny
Today 8 Jun St. Clair
Partly sunny. Near steady temperature in the lower 80s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph.
Tonight 8 Jun St. Clair
Mostly cloudy with a chance of Thunderstorms. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the mid 60s. North Winds around 5 Mph. Chance of rain 50 percent.
O'Fallon Temperature Statistics
June Temperature
Belleville, Scott AFB/MidAmerica Airport (4.3 miles)
Lowest 2 June, 2024
61.9 °FAverage June
74.1 °FHighest 3 June, 2024
88 °F
Climate (2019–Present)
Belleville, Scott AFB/MidAmerica Airport (4.3 miles)
Take a look at our website widgetsAvailable free! Find Out MoreAverage Low 2019–2024
47.1 °FAverage 2019–2024
56.9 °FAverage High 2019–2024
67 °F