Weather in O'Fallon, Missouri, United States

7-Day Detailed Weather Forecast for O'Fallon

This Afternoon

Temperature: 17°F

Wind Speed: 3 mph

Wind Direction: N

Forecast: Sunny, with a high near 17. North wind around 3 mph.

Tonight

Temperature: 12°F

Wind Speed: 2 to 8 mph

Wind Direction: SE

Forecast: Clear, with a low around 12. Southeast wind 2 to 8 mph.

Monday

Temperature: 43°F

Wind Speed: 7 to 13 mph

Wind Direction: SW

Forecast: Sunny. High near 43, with temperatures falling to around 39 in the afternoon. Southwest wind 7 to 13 mph, with gusts as high as 24 mph.

Monday Night

Temperature: 28°F

Wind Speed: 6 mph

Wind Direction: SW

Forecast: Mostly clear, with a low around 28. Southwest wind around 6 mph.

Tuesday

Temperature: 51°F

Wind Speed: 5 to 8 mph

Wind Direction: SW

Forecast: Sunny. High near 51, with temperatures falling to around 46 in the afternoon. Southwest wind 5 to 8 mph.

Tuesday Night

Temperature: 35°F

Wind Speed: 6 mph

Wind Direction: SW

Forecast: Mostly cloudy, with a low around 35.

Wednesday

Temperature: 53°F

Wind Speed: 2 to 6 mph

Wind Direction: SW

Forecast: Mostly sunny, with a high near 53.

Wednesday Night

Temperature: 45°F

Wind Speed: 6 to 14 mph

Wind Direction: S

Forecast: A slight chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 20%.

Thursday

Temperature: 57°F

Wind Speed: 14 to 17 mph

Wind Direction: W

Forecast: A chance of rain showers. Partly sunny, with a high near 57. Chance of precipitation is 50%.

Thursday Night

Temperature: 20°F

Wind Speed: 3 to 13 mph

Wind Direction: NW

Forecast: Mostly clear, with a low around 20.

Friday

Temperature: 37°F

Wind Speed: 3 to 8 mph

Wind Direction: SW

Forecast: Mostly sunny, with a high near 37.

Friday Night

Temperature: 31°F

Wind Speed: 10 mph

Wind Direction: S

Forecast: Partly cloudy, with a low around 31.

Saturday

Temperature: 56°F

Wind Speed: 7 to 10 mph

Wind Direction: S

Forecast: Partly sunny, with a high near 56.

Saturday Night

Temperature: 33°F

Wind Speed: 6 mph

Wind Direction: NW

Forecast: Mostly cloudy, with a low around 33.