Weather in O'Fallon, Missouri, United States

7-Day Detailed Weather Forecast for O'Fallon

Tonight

Temperature: 36°F

Wind Speed: 7 mph

Wind Direction: SW

Forecast: Mostly cloudy, with a low around 36. Southwest wind around 7 mph.

Wednesday

Temperature: 54°F

Wind Speed: 2 to 7 mph

Wind Direction: SW

Forecast: Sunny. High near 54, with temperatures falling to around 48 in the afternoon. Southwest wind 2 to 7 mph.

Wednesday Night

Temperature: 44°F

Wind Speed: 7 to 14 mph

Wind Direction: S

Forecast: A slight chance of rain showers after midnight. Mostly cloudy. Low around 44, with temperatures rising to around 53 overnight. South wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

Thursday

Temperature: 55°F

Wind Speed: 14 to 18 mph

Wind Direction: SW

Forecast: Showers and thunderstorms before 3pm. Partly sunny. High near 55, with temperatures falling to around 44 in the afternoon. Southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 80%.

Thursday Night

Temperature: 23°F

Wind Speed: 9 to 18 mph

Wind Direction: NW

Forecast: Partly cloudy, with a low around 23. Northwest wind 9 to 18 mph, with gusts as high as 29 mph.

Friday

Temperature: 39°F

Wind Speed: 9 mph

Wind Direction: SW

Forecast: Sunny, with a high near 39.

Friday Night

Temperature: 34°F

Wind Speed: 12 mph

Wind Direction: S

Forecast: Partly cloudy, with a low around 34.

Saturday

Temperature: 55°F

Wind Speed: 8 to 12 mph

Wind Direction: SW

Forecast: Mostly sunny, with a high near 55.

Saturday Night

Temperature: 31°F

Wind Speed: 7 mph

Wind Direction: NW

Forecast: Partly cloudy, with a low around 31.

Sunday

Temperature: 44°F

Wind Speed: 7 mph

Wind Direction: N

Forecast: Mostly sunny, with a high near 44.

Sunday Night

Temperature: 31°F

Wind Speed: 6 mph

Wind Direction: E

Forecast: Mostly cloudy, with a low around 31.

Monday

Temperature: 46°F

Wind Speed: 7 mph

Wind Direction: SE

Forecast: Partly sunny, with a high near 46.

Monday Night

Temperature: 38°F

Wind Speed: 6 mph

Wind Direction: S

Forecast: Mostly cloudy, with a low around 38.

Tuesday

Temperature: 56°F

Wind Speed: 7 mph

Wind Direction: SW

Forecast: Partly sunny, with a high near 56.