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

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

A Few Clouds

53°F

12°C

Humidity 48%
Wind Speed NW 14 G 26 mph
Barometer 30.26 in (1024.8 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 5 Apr 1:54 pm CDT
Extended Forecast for

Decatur IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 54. West northwest wind around 14 mph, with gusts as high as 22 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 39. West wind 6 to 9 mph, with gusts as high as 15 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 55. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Northwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. East wind around 9 mph, with gusts as high as 15 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Southeast wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69. South southeast wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 69 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 54. West northwest wind around 14 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 39. West wind 6 to 9 mph, with gusts as high as 15 mph.
Monday
Sunny, with a high near 55. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Monday Night
Mostly cloudy, with a low around 33. Northwest wind around 10 mph, with gusts as high as 18 mph.
Tuesday
Partly sunny, with a high near 47. East wind around 9 mph, with gusts as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 38. Southeast wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 69. South southeast wind 13 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 71.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 54.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 70.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51.
Saturday
A chance of showers. Partly sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
1:26 pm CDT Apr 5, 2026
Forecast Valid:
2pm CDT Apr 5, 2026-6pm CDT Apr 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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