Weather in O'Fallon, Missouri, United States

7-Day Detailed Weather Forecast for O'Fallon

Overnight

Temperature: 13°F

Wind Speed: 3 mph

Wind Direction: NE

Forecast: Mostly cloudy. Low around 13, with temperatures rising to around 17 overnight. Northeast wind around 3 mph.

Thursday

Temperature: 23°F

Wind Speed: 6 mph

Wind Direction: NE

Forecast: A slight chance of snow after 4pm. Mostly cloudy, with a high near 23. Northeast wind around 6 mph. Chance of precipitation is 20%.

Thursday Night

Temperature: 6°F

Wind Speed: 5 mph

Wind Direction: N

Forecast: Snow likely before 9pm. Mostly cloudy, with a low around 6. North wind around 5 mph. Chance of precipitation is 60%. New snow accumulation of less than half an inch possible.

Friday

Temperature: 18°F

Wind Speed: 3 to 9 mph

Wind Direction: N

Forecast: Mostly sunny, with a high near 18. North wind 3 to 9 mph.

Friday Night

Temperature: 4°F

Wind Speed: 9 mph

Wind Direction: NW

Forecast: Partly cloudy, with a low around 4. Northwest wind around 9 mph.

Saturday

Temperature: 20°F

Wind Speed: 5 to 9 mph

Wind Direction: NW

Forecast: Sunny, with a high near 20.

Saturday Night

Temperature: 3°F

Wind Speed: 3 mph

Wind Direction: W

Forecast: Mostly clear, with a low around 3.

Sunday

Temperature: 30°F

Wind Speed: 2 to 6 mph

Wind Direction: SW

Forecast: A slight chance of snow after noon. Partly sunny, with a high near 30. Chance of precipitation is 20%.

Sunday Night

Temperature: 20°F

Wind Speed: 6 mph

Wind Direction: SW

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

Monday

Temperature: 37°F

Wind Speed: 3 to 7 mph

Wind Direction: W

Forecast: Partly sunny, with a high near 37.

Monday Night

Temperature: 20°F

Wind Speed: 3 mph

Wind Direction: W

Forecast: Mostly cloudy, with a low around 20.

Tuesday

Temperature: 37°F

Wind Speed: 6 mph

Wind Direction: W

Forecast: Mostly cloudy, with a high near 37.

Tuesday Night

Temperature: 24°F

Wind Speed: 6 mph

Wind Direction: N

Forecast: A chance of snow. Mostly cloudy, with a low around 24. Chance of precipitation is 30%. New snow accumulation of less than half an inch possible.

Wednesday

Temperature: 35°F

Wind Speed: 6 mph

Wind Direction: N

Forecast: A chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.