Weather in Alton, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Alton
Overnight |
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Temperature: 72°F Wind Speed: 5 mph Wind Direction: SW Forecast: Patchy fog after 4am. Partly cloudy, with a low around 72. Southwest wind around 5 mph. |
Wednesday |
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Temperature: 95°F Wind Speed: 3 to 9 mph Wind Direction: SW Forecast: Patchy fog before 8am, then a slight chance of rain showers between 9am and 10am, then a chance of showers and thunderstorms. Mostly sunny, with a high near 95. Heat index values as high as 105. Southwest wind 3 to 9 mph. Chance of precipitation is 30%. |
Wednesday Night |
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Temperature: 75°F Wind Speed: 7 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Heat index values as high as 101. Southwest wind around 7 mph. Chance of precipitation is 30%. |
Thursday |
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Temperature: 88°F Wind Speed: 8 mph Wind Direction: NW Forecast: A chance of showers and thunderstorms. Partly sunny. High near 88, with temperatures falling to around 84 in the afternoon. Northwest wind around 8 mph. Chance of precipitation is 50%. |
Thursday Night |
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Temperature: 70°F Wind Speed: 2 to 6 mph Wind Direction: N Forecast: A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 70. North wind 2 to 6 mph. Chance of precipitation is 50%. |
Friday |
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Temperature: 85°F Wind Speed: 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 chance of showers and thunderstorms. Mostly cloudy. High near 85, with temperatures falling to around 81 in the afternoon. Chance of precipitation is 40%. |
Friday Night |
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Temperature: 73°F Wind Speed: 6 mph Wind Direction: SE Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%. |
Saturday |
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Temperature: 91°F Wind Speed: 7 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 40%. |
Saturday Night |
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Temperature: 75°F Wind Speed: 6 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 40%. |
Sunday |
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Temperature: 93°F Wind Speed: 6 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Partly sunny, with a high near 93. Chance of precipitation is 30%. |
Sunday Night |
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Temperature: 75°F Wind Speed: 6 mph Wind Direction: E Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Chance of precipitation is 30%. |
Monday |
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Temperature: 92°F Wind Speed: 7 mph Wind Direction: SE 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: 76°F Wind Speed: 7 mph Wind Direction: S Forecast: A chance of showers and thunderstorms. Partly cloudy, with a low around 76. Chance of precipitation is 30%. |
Tuesday |
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Temperature: 95°F Wind Speed: 5 to 8 mph Wind Direction: S Forecast: A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 95. Chance of precipitation is 20%. |