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: 71°F Wind Speed: 2 mph Wind Direction: S Forecast: Partly cloudy, with a low around 71. South wind around 2 mph. |
Thursday |
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Temperature: 91°F Wind Speed: 2 to 6 mph Wind Direction: S Forecast: A slight chance of rain showers between 1pm and 4pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Heat index values as high as 100. South wind 2 to 6 mph. Chance of precipitation is 20%. |
Thursday Night |
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Temperature: 72°F Wind Speed: 6 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. Southeast wind around 6 mph. Chance of precipitation is 20%. |
Friday |
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Temperature: 93°F Wind Speed: 3 to 9 mph Wind Direction: S Forecast: Sunny, with a high near 93. South wind 3 to 9 mph. |
Friday Night |
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Temperature: 73°F Wind Speed: 6 to 9 mph Wind Direction: SE Forecast: Mostly clear, with a low around 73. Southeast wind 6 to 9 mph. |
Saturday |
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Temperature: 93°F Wind Speed: 6 to 10 mph Wind Direction: S Forecast: Sunny, with a high near 93. |
Saturday Night |
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Temperature: 73°F Wind Speed: 6 to 9 mph Wind Direction: S Forecast: Mostly clear, with a low around 73. |
Sunday |
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Temperature: 92°F Wind Speed: 8 mph Wind Direction: S Forecast: Mostly sunny, with a high near 92. |
Sunday Night |
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Temperature: 74°F Wind Speed: 7 mph Wind Direction: S Forecast: Partly cloudy, with a low around 74. |
Monday |
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Temperature: 92°F Wind Speed: 8 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 20%. |
Monday Night |
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Temperature: 73°F Wind Speed: 7 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 20%. |
Tuesday |
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Temperature: 91°F Wind Speed: 3 to 7 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%. |
Tuesday Night |
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Temperature: 71°F Wind Speed: 2 to 6 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71. Chance of precipitation is 30%. |
Wednesday |
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Temperature: 92°F Wind Speed: 2 to 7 mph Wind Direction: W Forecast: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. Chance of precipitation is 20%. |