Weather in O'Fallon, Missouri, United States

7-Day Detailed Weather Forecast for O'Fallon

Today

Temperature: 57°F

Wind Speed: 9 to 15 mph

Wind Direction: NW

Forecast: Sunny, with a high near 57. Northwest wind 9 to 15 mph, with gusts as high as 25 mph.

Tonight

Temperature: 41°F

Wind Speed: 3 to 14 mph

Wind Direction: W

Forecast: Clear, with a low around 41. West wind 3 to 14 mph.

Sunday

Temperature: 67°F

Wind Speed: 5 to 13 mph

Wind Direction: W

Forecast: Sunny, with a high near 67. West wind 5 to 13 mph, with gusts as high as 25 mph.

Sunday Night

Temperature: 41°F

Wind Speed: 3 to 8 mph

Wind Direction: NE

Forecast: Mostly clear, with a low around 41. Northeast wind 3 to 8 mph.

Monday

Temperature: 68°F

Wind Speed: 3 to 7 mph

Wind Direction: SE

Forecast: Sunny, with a high near 68. Southeast wind 3 to 7 mph.

Monday Night

Temperature: 51°F

Wind Speed: 8 mph

Wind Direction: S

Forecast: Mostly clear, with a low around 51.

Tuesday

Temperature: 78°F

Wind Speed: 8 to 13 mph

Wind Direction: SW

Forecast: Mostly sunny, with a high near 78.

Tuesday Night

Temperature: 57°F

Wind Speed: 6 to 9 mph

Wind Direction: SW

Forecast: Partly cloudy, with a low around 57.

Wednesday

Temperature: 81°F

Wind Speed: 7 mph

Wind Direction: SW

Forecast: Sunny, with a high near 81.

Wednesday Night

Temperature: 61°F

Wind Speed: 7 mph

Wind Direction: S

Forecast: Mostly clear, with a low around 61.

Thursday

Temperature: 84°F

Wind Speed: 7 to 14 mph

Wind Direction: S

Forecast: Sunny, with a high near 84.

Thursday Night

Temperature: 63°F

Wind Speed: 13 mph

Wind Direction: S

Forecast: A slight chance of showers and thunderstorms between 7pm and 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

Friday

Temperature: 78°F

Wind Speed: 13 mph

Wind Direction: SW

Forecast: Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 78. Chance of precipitation is 60%.

Friday Night

Temperature: 49°F

Wind Speed: 12 mph

Wind Direction: NW

Forecast: A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.