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: 89°F Wind Speed: 6 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 89. South wind around 6 mph. Chance of precipitation is 20%. |
Tonight |
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Temperature: 71°F Wind Speed: 2 to 6 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind 2 to 6 mph. Chance of precipitation is 40%. |
Sunday |
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Temperature: 87°F Wind Speed: 2 to 7 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 87. South wind 2 to 7 mph. Chance of precipitation is 40%. |
Sunday Night |
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Temperature: 71°F Wind Speed: 6 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 6 mph. Chance of precipitation is 50%. |
Monday |
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Temperature: 88°F Wind Speed: 5 to 8 mph Wind Direction: W Forecast: A chance of showers and thunderstorms before 10am, then showers and thunderstorms. Partly sunny, with a high near 88. West wind 5 to 8 mph. Chance of precipitation is 80%. |
Monday Night |
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Temperature: 70°F Wind Speed: 3 to 8 mph Wind Direction: NW Forecast: Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 80%. |
Tuesday |
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Temperature: 86°F Wind Speed: 6 mph Wind Direction: NW Forecast: Sunny, with a high near 86. |
Tuesday Night |
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Temperature: 67°F Wind Speed: 1 to 5 mph Wind Direction: NW Forecast: Mostly clear, with a low around 67. |
Wednesday |
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Temperature: 88°F Wind Speed: 3 mph Wind Direction: W Forecast: Mostly sunny, with a high near 88. |
Wednesday Night |
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Temperature: 69°F Wind Speed: 3 mph Wind Direction: SE Forecast: Mostly clear, with a low around 69. |
Thursday |
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Temperature: 90°F Wind Speed: 2 to 6 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 90. Chance of precipitation is 20%. |
Thursday Night |
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Temperature: 71°F Wind Speed: 5 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Chance of precipitation is 20%. |
Independence Day |
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Temperature: 91°F Wind Speed: 2 to 7 mph Wind Direction: S Forecast: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Sunny, with a high near 91. Chance of precipitation is 30%. |
Friday Night |
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Temperature: 74°F Wind Speed: 6 mph Wind Direction: S Forecast: A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 74. Chance of precipitation is 30%. |