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.

Overcast

51°F

11°C

Humidity 41%
Wind Speed NW 10 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 6 Apr 9:54 pm CDT
Extended Forecast for

Decatur IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. North wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow before 8am. Mostly cloudy, with a high near 47. East wind 9 to 11 mph, with gusts as high as 16 mph.

    High: 47 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. East southeast wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 68. South wind 11 to 17 mph, with gusts as high as 29 mph.

    High: 68 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. South wind around 14 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 55. South wind around 10 mph, with gusts as high as 17 mph.

    Low: 55 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.

    High: 68 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. North wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of snow before 8am. Mostly cloudy, with a high near 47. East wind 9 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 37. East southeast wind 8 to 10 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 68. South wind 11 to 17 mph, with gusts as high as 29 mph.
Wednesday Night
Partly cloudy, with a low around 53. South wind around 14 mph, with gusts as high as 23 mph.
Thursday
Mostly sunny, with a high near 72. South southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 55. South wind around 10 mph, with gusts as high as 17 mph.
Friday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 48.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
A chance of showers. Mostly cloudy, with a high near 80.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 64.
Monday
Showers likely. Mostly cloudy, with a high near 79. Breezy.
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:
9:37 pm CDT Apr 6, 2026
Forecast Valid:
10pm CDT Apr 6, 2026-6pm CDT Apr 13, 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