Weather in O'Fallon, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for O'Fallon
This Afternoon |
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Temperature: 94°F Wind Speed: 9 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 94. Heat index values as high as 106. Southwest wind around 9 mph. Chance of precipitation is 30%. |
Tonight |
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Temperature: 75°F Wind Speed: 2 to 7 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 75. Heat index values as high as 101. Southwest wind 2 to 7 mph. Chance of precipitation is 30%. |
Thursday |
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Temperature: 88°F Wind Speed: 3 to 7 mph Wind Direction: N Forecast: A chance of showers and thunderstorms after 1pm. Partly sunny. High near 88, with temperatures falling to around 84 in the afternoon. North wind 3 to 7 mph. Chance of precipitation is 50%. |
Thursday Night |
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Temperature: 72°F Wind Speed: 5 mph Wind Direction: NE Forecast: A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Northeast wind around 5 mph. Chance of precipitation is 50%. |
Friday |
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Temperature: 87°F Wind Speed: 5 mph Wind Direction: E Forecast: Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 87. East wind around 5 mph. Chance of precipitation is 60%. |
Friday Night |
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Temperature: 73°F Wind Speed: 5 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 50%. |
Saturday |
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Temperature: 93°F Wind Speed: 7 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 30%. |
Saturday Night |
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Temperature: 76°F Wind Speed: 6 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Chance of precipitation is 30%. |
Sunday |
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Temperature: 92°F Wind Speed: 6 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 30%. |
Sunday Night |
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Temperature: 75°F Wind Speed: 6 mph Wind Direction: SE Forecast: A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 30%. |
Monday |
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Temperature: 95°F Wind Speed: 5 to 8 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 95. Chance of precipitation is 30%. |
Monday Night |
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Temperature: 77°F Wind Speed: 6 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 77. Chance of precipitation is 30%. |
Tuesday |
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Temperature: 96°F Wind Speed: 7 mph Wind Direction: S Forecast: Sunny, with a high near 96. |
Tuesday Night |
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Temperature: 78°F Wind Speed: 6 mph Wind Direction: S Forecast: Mostly clear, with a low around 78. |