Weather in O'Fallon, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for O'Fallon
Tonight |
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Temperature: 60°F Wind Speed: 5 mph Wind Direction: S Forecast: Mostly clear, with a low around 60. South wind around 5 mph. |
Friday |
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Temperature: 84°F Wind Speed: 6 to 16 mph Wind Direction: S Forecast: Isolated showers and thunderstorms after 5pm. Mostly sunny, with a high near 84. South wind 6 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. |
Friday Night |
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Temperature: 51°F Wind Speed: 13 to 16 mph Wind Direction: SW Forecast: Showers and thunderstorms before 1am, then showers and thunderstorms. Mostly cloudy. Low around 51, with temperatures rising to around 59 overnight. Southwest wind 13 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. |
Saturday |
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Temperature: 61°F Wind Speed: 14 to 17 mph Wind Direction: NW Forecast: A chance of rain showers. Partly sunny. High near 61, with temperatures falling to around 57 in the afternoon. Northwest wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. |
Saturday Night |
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Temperature: 39°F Wind Speed: 6 to 15 mph Wind Direction: NW Forecast: A chance of rain showers before 7pm. Mostly clear, with a low around 39. Northwest wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 30%. |
Sunday |
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Temperature: 65°F Wind Speed: 6 to 14 mph Wind Direction: NW Forecast: Sunny, with a high near 65. |
Sunday Night |
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Temperature: 42°F Wind Speed: 3 to 8 mph Wind Direction: NE Forecast: Mostly clear, with a low around 42. |
Monday |
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Temperature: 72°F Wind Speed: 5 to 9 mph Wind Direction: SE Forecast: Sunny, with a high near 72. |
Monday Night |
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Temperature: 52°F Wind Speed: 9 mph Wind Direction: S Forecast: Mostly clear, with a low around 52. |
Tuesday |
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Temperature: 77°F Wind Speed: 8 to 14 mph Wind Direction: SW Forecast: Sunny, with a high near 77. |
Tuesday Night |
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Temperature: 57°F Wind Speed: 6 to 12 mph Wind Direction: SW Forecast: Partly cloudy, with a low around 57. |
Wednesday |
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Temperature: 78°F Wind Speed: 6 to 10 mph Wind Direction: SW Forecast: Sunny, with a high near 78. |
Wednesday Night |
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Temperature: 57°F Wind Speed: 8 mph Wind Direction: S Forecast: Mostly clear, with a low around 57. |
Thursday |
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Temperature: 78°F Wind Speed: 7 to 13 mph Wind Direction: S Forecast: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 78. Chance of precipitation is 30%. |