O'Fallon Weather Forecast
- 62
- 74
Rain Showers Likely
- 67
- 84
Chance Rain Showers
- 69
- 85
Thunderstorms Likely
- 70
- 85
Rain Showers Likely
- 67
- 87
Chance Thunderstorms
- 64
- 85
Slight Chance Thunderstorms
Today 1 Jun St. Clair
Cloudy with a chance of Thunderstorms. Showers Likely, mainly in the morning. Highs in the mid 70s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.
Tonight 1 Jun St. Clair
Mostly cloudy. A chance of Showers and Thunderstorms in the evening. Lows in the lower 60s. Northwest Winds around 5 Mph. Chance of rain 40 percent.
O'Fallon Temperature Statistics
June Temperature
Belleville, Scott AFB/MidAmerica Airport (4.3 miles)
Lowest
–Average June
–Highest
–
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