Weather in O'Fallon, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for O'Fallon
Today |
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Temperature: 94°F Wind Speed: 7 mph Wind Direction: SW Forecast: Mostly sunny, with a high near 94. Heat index values as high as 109. Southwest wind around 7 mph. |
Tonight |
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Temperature: 75°F Wind Speed: 6 mph Wind Direction: E Forecast: A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 75. Heat index values as high as 106. East wind around 6 mph. Chance of precipitation is 40%. |
Monday |
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Temperature: 90°F Wind Speed: 6 mph Wind Direction: NE Forecast: A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 90. Heat index values as high as 102. Northeast wind around 6 mph. Chance of precipitation is 30%. |
Monday Night |
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Temperature: 75°F Wind Speed: 5 mph Wind Direction: E Forecast: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 75. East wind around 5 mph. Chance of precipitation is 30%. |
Tuesday |
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Temperature: 92°F Wind Speed: 6 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Southeast wind around 6 mph. Chance of precipitation is 20%. |
Tuesday Night |
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Temperature: 77°F Wind Speed: 6 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 77. Chance of precipitation is 20%. |
Wednesday |
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Temperature: 96°F Wind Speed: 3 to 7 mph Wind Direction: S Forecast: Sunny, with a high near 96. |
Wednesday Night |
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Temperature: 78°F Wind Speed: 6 mph Wind Direction: S Forecast: Mostly clear, with a low around 78. |
Thursday |
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Temperature: 96°F Wind Speed: 3 to 7 mph Wind Direction: S Forecast: Sunny, with a high near 96. |
Thursday Night |
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Temperature: 76°F Wind Speed: 6 mph Wind Direction: S Forecast: Mostly clear, with a low around 76. |
Friday |
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Temperature: 95°F Wind Speed: 7 mph Wind Direction: S Forecast: Mostly sunny, with a high near 95. |
Friday Night |
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Temperature: 77°F Wind Speed: 6 mph Wind Direction: S Forecast: Partly cloudy, with a low around 77. |
Saturday |
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Temperature: 95°F Wind Speed: 6 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. Chance of precipitation is 20%. |
Saturday Night |
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Temperature: 76°F Wind Speed: 6 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Chance of precipitation is 20%. |