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

71°F

22°C

Humidity 68%
Wind Speed SW 12 mph
Barometer 30.16 in (1020.7 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 4 Oct 12:54 am CDT
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Mostly clear, with a low around 63. South southwest wind around 6 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88. South southwest wind 5 to 11 mph, with gusts as high as 16 mph.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. South wind 6 to 8 mph.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind 7 to 14 mph, with gusts as high as 23 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. South wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers after 1pm. Sunny, with a high near 87. South southwest wind 6 to 9 mph.

    High: 87 °F

    Sunny then
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 63. South wind 5 to 7 mph. Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers before 1pm. Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 63. South southwest wind around 6 mph.
Saturday
Sunny, with a high near 88. South southwest wind 5 to 11 mph, with gusts as high as 16 mph.
Saturday Night
Clear, with a low around 60. South wind 6 to 8 mph.
Sunday
Sunny, with a high near 87. South wind 7 to 14 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 64. South wind 7 to 10 mph, with gusts as high as 15 mph.
Monday
A 30 percent chance of showers after 1pm. Sunny, with a high near 87. South southwest wind 6 to 9 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. South wind 5 to 7 mph. Chance of precipitation is 50%.
Tuesday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
12:36 am CDT Oct 4, 2025
Forecast Valid:
1am CDT Oct 4, 2025-6pm CDT Oct 10, 2025
 
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