Weather in Alton, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Alton
This Afternoon |
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Temperature: 94°F Wind Speed: 8 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms after 3pm. Partly sunny. High near 94, with temperatures falling to around 90 in the afternoon. Heat index values as high as 107. Southwest wind around 8 mph. Chance of precipitation is 30%. |
Tonight |
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Temperature: 75°F Wind Speed: 2 to 6 mph Wind Direction: E Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. East wind 2 to 6 mph. Chance of precipitation is 50%. |
Monday |
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Temperature: 90°F Wind Speed: 2 to 6 mph Wind Direction: E Forecast: A chance of showers and thunderstorms before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 90. Heat index values as high as 100. East wind 2 to 6 mph. Chance of precipitation is 50%. |
Monday Night |
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Temperature: 75°F Wind Speed: 6 mph Wind Direction: E Forecast: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 75. East wind around 6 mph. Chance of precipitation is 20%. |
Tuesday |
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Temperature: 95°F Wind Speed: 6 mph Wind Direction: SE Forecast: A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 95. Southeast wind around 6 mph. Chance of precipitation is 20%. |
Tuesday Night |
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Temperature: 76°F Wind Speed: 6 mph Wind Direction: SE Forecast: Mostly clear, with a low around 76. |
Wednesday |
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Temperature: 97°F Wind Speed: 6 mph Wind Direction: S Forecast: Sunny, with a high near 97. |
Wednesday Night |
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Temperature: 77°F Wind Speed: 6 mph Wind Direction: S Forecast: Mostly clear, with a low around 77. |
Thursday |
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Temperature: 97°F Wind Speed: 3 to 7 mph Wind Direction: S Forecast: Sunny, with a high near 97. |
Thursday Night |
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Temperature: 77°F Wind Speed: 7 mph Wind Direction: S Forecast: Mostly clear, with a low around 77. |
Friday |
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Temperature: 96°F Wind Speed: 7 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Chance of precipitation is 20%. |
Friday Night |
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Temperature: 77°F Wind Speed: 6 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 77. Chance of precipitation is 20%. |
Saturday |
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Temperature: 95°F Wind Speed: 6 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 95. 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. Partly cloudy, with a low around 76. Chance of precipitation is 30%. |