Weather in O'Fallon, Missouri, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for O'Fallon
Overnight |
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Temperature: 74°F Wind Speed: 3 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. South wind around 3 mph. Chance of precipitation is 30%. |
Saturday |
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Temperature: 94°F Wind Speed: 3 to 7 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 10am, then a chance of showers and thunderstorms. Mostly sunny. High near 94, with temperatures falling to around 90 in the afternoon. Heat index values as high as 107. Southwest wind 3 to 7 mph. Chance of precipitation is 30%. |
Saturday Night |
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Temperature: 77°F Wind Speed: 6 mph Wind Direction: SW Forecast: Partly cloudy, with a low around 77. Southwest wind around 6 mph. |
Sunday |
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Temperature: 95°F Wind Speed: 6 mph Wind Direction: W Forecast: Mostly sunny, with a high near 95. Heat index values as high as 107. West wind around 6 mph. |
Sunday Night |
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Temperature: 76°F Wind Speed: 5 mph Wind Direction: S Forecast: A chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 76. South wind around 5 mph. Chance of precipitation is 40%. |
Monday |
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Temperature: 92°F Wind Speed: 5 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Partly sunny, with a high near 92. Chance of precipitation is 30%. |
Monday Night |
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Temperature: 75°F Wind Speed: 5 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. Chance of precipitation is 20%. |
Tuesday |
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Temperature: 96°F Wind Speed: 6 mph Wind Direction: S Forecast: Sunny, with a high near 96. |
Tuesday Night |
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Temperature: 76°F Wind Speed: 5 mph Wind Direction: S Forecast: Mostly clear, with a low around 76. |
Wednesday |
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Temperature: 98°F Wind Speed: 6 mph Wind Direction: S Forecast: Sunny, with a high near 98. |
Wednesday Night |
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Temperature: 76°F Wind Speed: 5 mph Wind Direction: S Forecast: Mostly clear, with a low around 76. |
Thursday |
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Temperature: 98°F Wind Speed: 6 mph Wind Direction: SW Forecast: Sunny, with a high near 98. |
Thursday Night |
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Temperature: 77°F Wind Speed: 5 mph Wind Direction: S Forecast: Mostly clear, with a low around 77. |
Friday |
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Temperature: 97°F Wind Speed: 6 mph Wind Direction: SW Forecast: Sunny, with a high near 97. |