Weather in O'Fallon, Illinois, United States

7-Day Detailed Weather Forecast for O'Fallon

This Afternoon

Temperature: 71°F

Wind Speed: 10 mph

Wind Direction: S

Forecast: Mostly sunny. High near 71, with temperatures falling to around 65 in the afternoon. South wind around 10 mph.

Tonight

Temperature: 51°F

Wind Speed: 8 to 12 mph

Wind Direction: S

Forecast: Mostly cloudy, with a low around 51. South wind 8 to 12 mph.

Wednesday

Temperature: 69°F

Wind Speed: 8 to 15 mph

Wind Direction: W

Forecast: Sunny. High near 69, with temperatures falling to around 62 in the afternoon. West wind 8 to 15 mph, with gusts as high as 26 mph.

Wednesday Night

Temperature: 38°F

Wind Speed: 3 to 7 mph

Wind Direction: NE

Forecast: Clear, with a low around 38. Northeast wind 3 to 7 mph.

Thursday

Temperature: 64°F

Wind Speed: 5 to 14 mph

Wind Direction: SE

Forecast: Sunny. High near 64, with temperatures falling to around 59 in the afternoon. Southeast wind 5 to 14 mph.

Thursday Night

Temperature: 52°F

Wind Speed: 12 mph

Wind Direction: S

Forecast: A chance of rain showers after midnight. Mostly cloudy. Low around 52, with temperatures rising to around 57 overnight. Chance of precipitation is 30%.

Friday

Temperature: 71°F

Wind Speed: 9 to 13 mph

Wind Direction: SW

Forecast: A chance of rain showers. Mostly sunny, with a high near 71. Chance of precipitation is 40%.

Friday Night

Temperature: 44°F

Wind Speed: 2 to 8 mph

Wind Direction: NW

Forecast: Mostly clear, with a low around 44.

Saturday

Temperature: 68°F

Wind Speed: 2 to 10 mph

Wind Direction: SW

Forecast: Mostly sunny, with a high near 68.

Saturday Night

Temperature: 39°F

Wind Speed: 9 to 13 mph

Wind Direction: W

Forecast: A chance of rain before midnight. Partly cloudy, with a low around 39. Chance of precipitation is 30%.

Sunday

Temperature: 46°F

Wind Speed: 16 mph

Wind Direction: NW

Forecast: Partly sunny, with a high near 46.

Sunday Night

Temperature: 26°F

Wind Speed: 7 to 13 mph

Wind Direction: NW

Forecast: Partly cloudy, with a low around 26.

Monday

Temperature: 43°F

Wind Speed: 8 to 12 mph

Wind Direction: NW

Forecast: Sunny, with a high near 43.

Monday Night

Temperature: 26°F

Wind Speed: 7 mph

Wind Direction: W

Forecast: Mostly clear, with a low around 26.