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.

Fair

53°F

12°C

Humidity 74%
Wind Speed N 5 mph
Barometer 29.85 in (1010.7 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 25 Apr 2:54 am CDT
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Partly cloudy, with a low around 50. North wind around 6 mph.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74. Northeast wind 7 to 10 mph, with gusts as high as 16 mph.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 49. Northeast wind 8 to 10 mph, with gusts as high as 15 mph.

    Low: 49 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 75. East wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 58. East southeast wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 58 °F

    Mostly Cloudy

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 79. Breezy, with a southeast wind 16 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Chance
    T-storms then
    T-storms
    Likely and
    Breezy

  • Monday Night

    Monday Night: Showers and thunderstorms before 1am. Low around 52. Breezy, with a west southwest wind 11 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 52 °F

    T-storms and
    Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 50. North wind around 6 mph.
Saturday
Sunny, with a high near 74. Northeast wind 7 to 10 mph, with gusts as high as 16 mph.
Saturday Night
Mostly clear, with a low around 49. Northeast wind 8 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly sunny, with a high near 75. East wind 9 to 11 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 58. East southeast wind 10 to 14 mph, with gusts as high as 23 mph.
Monday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 79. Breezy, with a southeast wind 16 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and thunderstorms before 1am. Low around 52. Breezy, with a west southwest wind 11 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 48.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 65.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.86°N 88.94°W (Elev. 682 ft)
Last Update:
1:26 am CDT Apr 25, 2026
Forecast Valid:
3am CDT Apr 25, 2026-6pm CDT May 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation