National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Light Rain

74°F

23°C

Humidity 94%
Wind Speed SE 8 mph
Barometer 29.95 in (1013.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 8 Jun 8:54 pm CDT
Extended Forecast for

Decatur IL

Flood Watch June 8, 09:07pm until June 9, 01:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 8, 09:07pm until June 9, 01:00am

    NOW until 1:00am Tue

    Flood Watch

  • Tonight

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 88. West southwest wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 72. West wind 5 to 9 mph becoming south in the evening. Winds could gust as high as 15 mph.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 91. South southwest wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely after 1am. Partly cloudy, with a low around 72. South wind 11 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Mostly Sunny
    then Showers
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am. Low around 66. South southwest wind 9 to 16 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers

  • Friday

    Friday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely before 4am, then a slight chance of showers. Mostly cloudy, with a low around 68. South wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers and thunderstorms before 11am, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 88. West southwest wind 7 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 20%.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 72. West wind 5 to 9 mph becoming south in the evening. Winds could gust as high as 15 mph.
Wednesday
Sunny, with a high near 91. South southwest wind 9 to 16 mph, with gusts as high as 26 mph.
Wednesday Night
A chance of showers and thunderstorms, then showers likely after 1am. Partly cloudy, with a low around 72. South wind 11 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm before 1am. Low around 66. South southwest wind 9 to 16 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 86.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Sunday Night
A chance of showers. Partly cloudy, with a low around 60.
Monday
Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.86°N 88.94°W (Elev. 682 ft)
Last Update:
7:35 pm CDT Jun 8, 2026
Forecast Valid:
9pm CDT Jun 8, 2026-6pm CDT Jun 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation