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: 61°F Wind Speed: 5 to 12 mph Wind Direction: S Forecast: Showers and thunderstorms likely before 1am, then showers and thunderstorms likely between 1am and 2am, then a chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 61. South wind 5 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. |
Thursday |
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Temperature: 73°F Wind Speed: 14 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms before 8am, then showers and thunderstorms between 8am and 5pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 73. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. |
Thursday Night |
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Temperature: 57°F Wind Speed: 6 to 10 mph Wind Direction: W Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. West wind 6 to 10 mph. Chance of precipitation is 30%. |
Friday |
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Temperature: 71°F Wind Speed: 8 mph Wind Direction: W Forecast: A chance of showers and thunderstorms. Partly sunny, with a high near 71. West wind around 8 mph. Chance of precipitation is 40%. |
Friday Night |
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Temperature: 51°F Wind Speed: 7 mph Wind Direction: NW Forecast: A chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Northwest wind around 7 mph. Chance of precipitation is 40%. |
Saturday |
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Temperature: 67°F Wind Speed: 6 to 9 mph Wind Direction: N Forecast: A chance of rain showers. Mostly sunny, with a high near 67. Chance of precipitation is 30%. |
Saturday Night |
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Temperature: 47°F Wind Speed: 5 to 8 mph Wind Direction: NE Forecast: A chance of rain showers. Partly cloudy, with a low around 47. Chance of precipitation is 30%. |
Sunday |
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Temperature: 69°F Wind Speed: 6 to 9 mph Wind Direction: E Forecast: A chance of rain showers. Sunny, with a high near 69. Chance of precipitation is 30%. |
Sunday Night |
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Temperature: 49°F Wind Speed: 3 to 7 mph Wind Direction: E Forecast: A chance of rain showers before 7pm. Mostly clear, with a low around 49. Chance of precipitation is 30%. |
Monday |
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Temperature: 72°F Wind Speed: 5 to 8 mph Wind Direction: E Forecast: Sunny, with a high near 72. |
Monday Night |
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Temperature: 52°F Wind Speed: 6 mph Wind Direction: SE Forecast: Mostly clear, with a low around 52. |
Tuesday |
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Temperature: 77°F Wind Speed: 5 to 8 mph Wind Direction: SE Forecast: Mostly sunny, with a high near 77. |
Tuesday Night |
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Temperature: 55°F Wind Speed: 6 mph Wind Direction: SE Forecast: A slight chance of rain showers after 1am. Partly cloudy, with a low around 55. Chance of precipitation is 20%. |
Wednesday |
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Temperature: 80°F Wind Speed: 8 mph Wind Direction: SE Forecast: A chance of rain showers. Mostly sunny, with a high near 80. Chance of precipitation is 30%. |