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

59°F

15°C

Humidity 81%
Wind Speed SW 9 mph
Barometer 30.13 in (1020.0 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 10 Apr 4:54 am CDT
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 59. Southwest wind around 15 mph, with gusts as high as 24 mph.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 10am. Cloudy, with a high near 65. West southwest wind 9 to 11 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers
    Likely then
    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 44. East northeast wind 6 to 9 mph, with gusts as high as 16 mph.

    Low: 44 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Increasing clouds, with a high near 66. East southeast wind 8 to 10 mph, with gusts as high as 17 mph.

    High: 66 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 58. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 58 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 13 to 23 mph, with gusts as high as 36 mph.

    High: 79 °F

    Partly Sunny
    then Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 63. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Showers
    Likely and
    Breezy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81.

    High: 81 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 66.

    Low: 66 °F

    Chance
    Showers

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 59. Southwest wind around 15 mph, with gusts as high as 24 mph.
Friday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 10am. Cloudy, with a high near 65. West southwest wind 9 to 11 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 44. East northeast wind 6 to 9 mph, with gusts as high as 16 mph.
Saturday
Increasing clouds, with a high near 66. East southeast wind 8 to 10 mph, with gusts as high as 17 mph.
Saturday Night
Mostly cloudy, with a low around 58. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Sunday
A 30 percent chance of showers after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 13 to 23 mph, with gusts as high as 36 mph.
Sunday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 63. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81.
Monday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 66.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64.
Wednesday
A chance of showers. Partly sunny, with a high near 79.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 57.
Thursday
A chance of showers. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
5:11 am CDT Apr 10, 2026
Forecast Valid:
5am CDT Apr 10, 2026-6pm CDT Apr 16, 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