Weather in O'Fallon, Missouri, United States

7-Day Detailed Weather Forecast for O'Fallon

Overnight

Temperature: 29°F

Wind Speed: 7 mph

Wind Direction: N

Forecast: Mostly cloudy, with a low around 29. North wind around 7 mph.

Friday

Temperature: 36°F

Wind Speed: 6 to 9 mph

Wind Direction: N

Forecast: Mostly cloudy, with a high near 36. North wind 6 to 9 mph.

Friday Night

Temperature: 22°F

Wind Speed: 7 mph

Wind Direction: NW

Forecast: Mostly cloudy, with a low around 22. Northwest wind around 7 mph.

Saturday

Temperature: 28°F

Wind Speed: 5 to 10 mph

Wind Direction: N

Forecast: A slight chance of snow after 11am. Mostly cloudy. High near 28, with temperatures falling to around 20 in the afternoon. North wind 5 to 10 mph. Chance of precipitation is 20%.

Saturday Night

Temperature: 5°F

Wind Speed: 10 mph

Wind Direction: N

Forecast: Partly cloudy, with a low around 5. North wind around 10 mph.

Sunday

Temperature: 15°F

Wind Speed: 3 to 9 mph

Wind Direction: N

Forecast: Sunny, with a high near 15.

Sunday Night

Temperature: 9°F

Wind Speed: 2 to 7 mph

Wind Direction: SE

Forecast: Clear, with a low around 9.

Monday

Temperature: 40°F

Wind Speed: 7 to 10 mph

Wind Direction: S

Forecast: Sunny, with a high near 40.

Monday Night

Temperature: 27°F

Wind Speed: 6 mph

Wind Direction: SW

Forecast: Partly cloudy, with a low around 27.

Tuesday

Temperature: 50°F

Wind Speed: 5 to 8 mph

Wind Direction: S

Forecast: Mostly sunny, with a high near 50.

Tuesday Night

Temperature: 37°F

Wind Speed: 7 mph

Wind Direction: S

Forecast: Mostly cloudy, with a low around 37.

Wednesday

Temperature: 56°F

Wind Speed: 9 mph

Wind Direction: S

Forecast: Partly sunny, with a high near 56.

Wednesday Night

Temperature: 43°F

Wind Speed: 9 mph

Wind Direction: SW

Forecast: A slight chance of rain after midnight. Mostly cloudy, with a low around 43. Chance of precipitation is 20%.

Thursday

Temperature: 53°F

Wind Speed: 8 to 12 mph

Wind Direction: W

Forecast: A slight chance of rain before noon. Mostly sunny, with a high near 53. Chance of precipitation is 20%.