Weather in O'Fallon, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for O'Fallon
Overnight |
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Temperature: 54°F Wind Speed: 6 mph Wind Direction: W Forecast: Patchy fog. Mostly cloudy, with a low around 54. West wind around 6 mph. |
Christmas Day |
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Temperature: 66°F Wind Speed: 6 mph Wind Direction: NE Forecast: Areas of fog before 11am. Mostly cloudy. High near 66, with temperatures falling to around 61 in the afternoon. Northeast wind around 6 mph. |
Thursday Night |
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Temperature: 59°F Wind Speed: 7 mph Wind Direction: S Forecast: Mostly cloudy, with a low around 59. South wind around 7 mph. |
Friday |
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Temperature: 71°F Wind Speed: 6 to 10 mph Wind Direction: W Forecast: Mostly sunny. High near 71, with temperatures falling to around 62 in the afternoon. West wind 6 to 10 mph. |
Friday Night |
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Temperature: 46°F Wind Speed: 3 mph Wind Direction: N Forecast: Partly cloudy, with a low around 46. North wind around 3 mph. |
Saturday |
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Temperature: 67°F Wind Speed: 2 to 10 mph Wind Direction: SE Forecast: Partly sunny, with a high near 67. |
Saturday Night |
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Temperature: 55°F Wind Speed: 9 mph Wind Direction: S Forecast: Mostly cloudy, with a low around 55. |
Sunday |
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Temperature: 61°F Wind Speed: 8 to 17 mph Wind Direction: W Forecast: Rain likely and a slight chance of thunderstorms. Cloudy, with a high near 61. Chance of precipitation is 60%. |
Sunday Night |
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Temperature: 21°F Wind Speed: 20 mph Wind Direction: NW Forecast: A chance of rain before midnight. Mostly cloudy, with a low around 21. Chance of precipitation is 30%. |
Monday |
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Temperature: 29°F Wind Speed: 12 to 18 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 29. |
Monday Night |
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Temperature: 18°F Wind Speed: 6 to 10 mph Wind Direction: NW Forecast: Mostly clear, with a low around 18. |
Tuesday |
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Temperature: 35°F Wind Speed: 8 mph Wind Direction: W Forecast: Mostly sunny, with a high near 35. |
Tuesday Night |
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Temperature: 24°F Wind Speed: 6 to 9 mph Wind Direction: SW Forecast: Mostly clear, with a low around 24. |
Wednesday |
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Temperature: 41°F Wind Speed: 12 mph Wind Direction: W Forecast: Mostly sunny, with a high near 41. |