National Weather Service United States Department of Commerce

The flash flooding threat will begin moving east out of the Plains into the Upper Midwest and Great Lakes on Thursday

Flash flooding will continue to be possible on Thursday but will begin moving out of the central and northern Plains. The area of concern will be the Upper Midwest edging into the the eastern Great Lakes region. 1 to 2 inches of rainfall will be possible into Friday.
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Hazardous Weather Conditions

Current Conditions

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Decatur IL

7 Day Forecast

For More Weather Information:

Lincoln, IL Local Forecast Office

Today

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 84 °F

Tonight

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 71 °F

Friday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 88 °F

Friday
Night

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

Low: 71 °F

Saturday

Thunderstorms Likely Chance for Measurable Precipitation 60%

Thunderstorms
Likely

High: 84 °F

Saturday
Night

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

Low: 68 °F

Sunday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 85 °F

Sunday
Night

Chance Thunderstorms

Chance
Thunderstorms

Low: 70 °F

Labor
Day

Chance Thunderstorms

Chance
Thunderstorms

High: 85 °F

Detailed Forecast

  • Today A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. East southeast wind 6 to 8 mph. Chance of precipitation is 30%.
  • Tonight A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East southeast wind around 7 mph.
  • Friday A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 88. South wind 6 to 10 mph.
  • Friday Night A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 8 mph.
  • Saturday Showers and thunderstorms likely. Mostly cloudy, with a high near 84. South southwest wind 8 to 13 mph, with gusts as high as 17 mph. Chance of precipitation is 60%.
  • Saturday Night A chance of showers before 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
  • Sunday A 30 percent chance of showers. Partly sunny, with a high near 85.
  • Sunday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
  • Labor Day A chance of showers and thunderstorms. Partly sunny, with a high near 85.
  • Monday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
  • Tuesday A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
  • Tuesday Night Partly cloudy, with a low around 64.
  • Wednesday Mostly sunny, with a high near 83.