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.

Overcast

65°F

18°C

Humidity 43%
Wind Speed N 13 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 9 May 11:54 pm CDT
Extended Forecast for

2 Miles SSW Decatur IL

  • Overnight

    Overnight: A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 51. North wind around 8 mph.

    Low: 51 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 66. North northwest wind 7 to 9 mph, with gusts as high as 15 mph.

    High: 66 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming clear, with a low around 42. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 42 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 70. Light west northwest wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 15 mph.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. North northwest wind 6 to 8 mph becoming south southeast after midnight.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 76. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 32 mph.

    High: 76 °F

    Sunny then
    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 54. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 70. Breezy.

    High: 70 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 51. North wind around 8 mph.
Sunday
Mostly sunny, with a high near 66. North northwest wind 7 to 9 mph, with gusts as high as 15 mph.
Sunday Night
Mostly cloudy, then gradually becoming clear, with a low around 42. North northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Sunny, with a high near 70. Light west northwest wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 45. North northwest wind 6 to 8 mph becoming south southeast after midnight.
Tuesday
Mostly sunny, with a high near 76. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 32 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 54. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.
Wednesday
Sunny, with a high near 70. Breezy.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Decatur IL
 39.86°N 88.94°W (Elev. 682 ft)
Last Update:
12:36 am CDT May 10, 2026
Forecast Valid:
12am CDT May 10, 2026-6pm CDT May 16, 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