Weather in Alton, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Alton
Tonight |
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Temperature: 66°F Wind Speed: 5 to 9 mph Wind Direction: W Forecast: A chance of showers and thunderstorms between 11pm and 2am, then a chance of showers and thunderstorms between 2am and 4am, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 66. West wind 5 to 9 mph. Chance of precipitation is 40%. |
Sunday |
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Temperature: 77°F Wind Speed: 12 to 15 mph Wind Direction: NW Forecast: A chance of showers and thunderstorms before 8am. Partly sunny, with a high near 77. Northwest wind 12 to 15 mph. Chance of precipitation is 50%. |
Sunday Night |
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Temperature: 57°F Wind Speed: 1 to 13 mph Wind Direction: NW Forecast: Partly cloudy, with a low around 57. Northwest wind 1 to 13 mph. |
Monday |
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Temperature: 78°F Wind Speed: 0 to 7 mph Wind Direction: NW Forecast: Sunny, with a high near 78. Northwest wind 0 to 7 mph. |
Monday Night |
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Temperature: 59°F Wind Speed: 6 mph Wind Direction: SW Forecast: Mostly clear, with a low around 59. Southwest wind around 6 mph. |
Tuesday |
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Temperature: 82°F Wind Speed: 5 to 12 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%. |
Tuesday Night |
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Temperature: 61°F Wind Speed: 2 to 10 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 30%. |
Wednesday |
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Temperature: 87°F Wind Speed: 3 to 21 mph Wind Direction: S Forecast: A slight chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 40%. |
Wednesday Night |
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Temperature: 69°F Wind Speed: 15 to 21 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 90%. |
Thursday |
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Temperature: 82°F Wind Speed: 10 to 14 mph Wind Direction: W Forecast: Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 60%. |
Thursday Night |
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Temperature: 62°F Wind Speed: 1 to 8 mph Wind Direction: NW Forecast: A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 62. Chance of precipitation is 40%. |
Juneteenth |
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Temperature: 84°F Wind Speed: 2 to 6 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 84. |
Friday Night |
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Temperature: 64°F Wind Speed: 5 mph Wind Direction: E Forecast: Partly cloudy, with a low around 64. |
Saturday |
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Temperature: 87°F Wind Speed: 2 to 9 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 20%. |