Weather in Alton, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Alton
Overnight |
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Temperature: 60°F Wind Speed: 5 mph Wind Direction: SE Forecast: Partly cloudy, with a low around 60. Southeast wind around 5 mph. |
Friday |
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Temperature: 86°F Wind Speed: 5 to 17 mph Wind Direction: S Forecast: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. South wind 5 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. |
Friday Night |
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Temperature: 48°F Wind Speed: 10 to 16 mph Wind Direction: SW Forecast: Showers and thunderstorms before 1am, then showers and thunderstorms. Mostly cloudy. Low around 48, with temperatures rising to around 55 overnight. Southwest wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. |
Saturday |
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Temperature: 58°F Wind Speed: 14 to 17 mph Wind Direction: NW Forecast: A chance of showers and thunderstorms. Mostly sunny, with a high near 58. Northwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. |
Saturday Night |
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Temperature: 39°F Wind Speed: 5 to 15 mph Wind Direction: NW Forecast: A slight chance of rain showers before 7pm. Mostly clear, with a low around 39. Northwest wind 5 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%. |
Sunday |
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Temperature: 66°F Wind Speed: 5 to 13 mph Wind Direction: W Forecast: Sunny, with a high near 66. |
Sunday Night |
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Temperature: 42°F Wind Speed: 3 to 8 mph Wind Direction: NE Forecast: Mostly clear, with a low around 42. |
Monday |
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Temperature: 71°F Wind Speed: 5 to 9 mph Wind Direction: SE Forecast: Sunny, with a high near 71. |
Monday Night |
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Temperature: 52°F Wind Speed: 8 mph Wind Direction: S Forecast: Mostly clear, with a low around 52. |
Tuesday |
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Temperature: 79°F Wind Speed: 8 to 15 mph Wind Direction: SW Forecast: Mostly sunny, with a high near 79. |
Tuesday Night |
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Temperature: 57°F Wind Speed: 6 to 12 mph Wind Direction: SW Forecast: Partly cloudy, with a low around 57. |
Wednesday |
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Temperature: 81°F Wind Speed: 6 to 10 mph Wind Direction: SW Forecast: Sunny, with a high near 81. |
Wednesday Night |
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Temperature: 59°F Wind Speed: 8 mph Wind Direction: S Forecast: Mostly clear, with a low around 59. |
Thursday |
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Temperature: 83°F Wind Speed: 6 to 14 mph Wind Direction: S Forecast: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 30%. |