Weather in Decatur, Illinois, United States
7-Day Forecast Summary
7-Day Detailed Weather Forecast for Decatur
Overnight |
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Temperature: 71°F Wind Speed: 3 mph Wind Direction: SSE Forecast: Patchy fog after 4am. Mostly cloudy, with a low around 71. South southeast wind around 3 mph. |
Sunday |
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Temperature: 89°F Wind Speed: 3 to 8 mph Wind Direction: S Forecast: Patchy fog before 7am, then a slight chance of showers and thunderstorms between 7am and 8am, then a chance of showers and thunderstorms between 8am and 11am, then a slight chance of showers and thunderstorms between 11am and noon. Mostly cloudy, with a high near 89. Heat index values as high as 103. South wind 3 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible. |
Sunday Night |
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Temperature: 75°F Wind Speed: 5 to 8 mph Wind Direction: SSW Forecast: A slight chance of rain showers after 5am. Partly cloudy, with a low around 75. Heat index values as high as 105. South southwest wind 5 to 8 mph, with gusts as high as 18 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Monday |
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Temperature: 92°F Wind Speed: 5 to 13 mph Wind Direction: SSW Forecast: A slight chance of rain showers before 7am. Mostly sunny, with a high near 92. Heat index values as high as 106. South southwest wind 5 to 13 mph, with gusts as high as 21 mph. New rainfall amounts less than a tenth of an inch possible. |
Monday Night |
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Temperature: 75°F Wind Speed: 8 to 13 mph Wind Direction: WSW Forecast: A slight chance of showers and thunderstorms between 7pm and 1am. Mostly clear, with a low around 75. West southwest wind 8 to 13 mph, with gusts as high as 21 mph. New rainfall amounts less than a tenth of an inch possible. |
Tuesday |
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Temperature: 89°F Wind Speed: 8 to 12 mph Wind Direction: NNW Forecast: Mostly sunny, with a high near 89. North northwest wind 8 to 12 mph, with gusts as high as 18 mph. |
Tuesday Night |
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Temperature: 65°F Wind Speed: 5 to 10 mph Wind Direction: NNE Forecast: Mostly clear, with a low around 65. North northeast wind 5 to 10 mph, with gusts as high as 16 mph. |
Wednesday |
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Temperature: 85°F Wind Speed: 5 to 9 mph Wind Direction: NNE Forecast: Sunny, with a high near 85. |
Wednesday Night |
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Temperature: 62°F Wind Speed: 2 to 8 mph Wind Direction: NE Forecast: Clear, with a low around 62. |
Thursday |
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Temperature: 86°F Wind Speed: 6 mph Wind Direction: E Forecast: Sunny, with a high near 86. |
Thursday Night |
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Temperature: 66°F Wind Speed: 5 mph Wind Direction: ESE Forecast: Partly cloudy, with a low around 66. |
Friday |
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Temperature: 85°F Wind Speed: 3 to 7 mph Wind Direction: S Forecast: A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. |
Friday Night |
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Temperature: 67°F Wind Speed: 2 to 7 mph Wind Direction: E Forecast: A chance of showers and thunderstorms before 7pm, then a slight chance of showers and thunderstorms. Partly cloudy, with a low around 67. |
Saturday |
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Temperature: 85°F Wind Speed: 2 to 8 mph Wind Direction: NNE Forecast: A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. |