Weather in Decatur, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Decatur
This Afternoon |
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Temperature: 95°F Wind Speed: 9 mph Wind Direction: SSW Forecast: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 95. Heat index values as high as 103. South southwest wind around 9 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Tonight |
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Temperature: 75°F Wind Speed: 8 mph Wind Direction: SSW Forecast: A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. Heat index values as high as 102. South southwest wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Friday |
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Temperature: 88°F Wind Speed: 7 to 12 mph Wind Direction: WSW Forecast: A chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 88. West southwest wind 7 to 12 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible. |
Friday Night |
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Temperature: 72°F Wind Speed: 3 to 9 mph Wind Direction: WSW Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. West southwest wind 3 to 9 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible. |
Saturday |
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Temperature: 90°F Wind Speed: 5 mph Wind Direction: WSW Forecast: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. West southwest wind around 5 mph. |
Saturday Night |
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Temperature: 71°F Wind Speed: 3 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 71. Southwest wind around 3 mph. |
Sunday |
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Temperature: 91°F Wind Speed: 6 mph Wind Direction: SSW Forecast: A chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 91. South southwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible. |
Sunday Night |
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Temperature: 72°F Wind Speed: 6 mph Wind Direction: SW Forecast: A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 50%. |
Monday |
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Temperature: 86°F Wind Speed: 7 mph Wind Direction: W Forecast: A chance of showers and thunderstorms before 1pm, then showers and thunderstorms likely. Partly sunny, with a high near 86. Chance of precipitation is 60%. |
Monday Night |
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Temperature: 68°F Wind Speed: 3 to 7 mph Wind Direction: NW Forecast: Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 68. |
Tuesday |
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Temperature: 85°F Wind Speed: 7 mph Wind Direction: NNW Forecast: Sunny, with a high near 85. |
Tuesday Night |
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Temperature: 65°F Wind Speed: 5 mph Wind Direction: NW Forecast: Partly cloudy, with a low around 65. |
Wednesday |
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Temperature: 87°F Wind Speed: 5 mph Wind Direction: NW Forecast: Mostly sunny, with a high near 87. |
Wednesday Night |
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Temperature: 66°F Wind Speed: 3 mph Wind Direction: NNE Forecast: Mostly clear, with a low around 66. |