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

67°F

19°C

Humidity 84%
Wind Speed NA
Barometer 29.96 in (1013.8 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 27 May 12:54 am CDT
Extended Forecast for

2 Miles NNW Blue Mound IL

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Light north northeast wind.

    Low: 65 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 3pm. Partly sunny, with a high near 81. Northeast wind 3 to 8 mph.

    High: 81 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. East wind around 6 mph becoming calm.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 83. East northeast wind 8 to 11 mph, with gusts as high as 15 mph.

    High: 83 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 59. East wind around 9 mph.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 79. East wind around 8 mph.

    High: 79 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. East wind 3 to 6 mph.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Light north northeast wind.
Wednesday
A 20 percent chance of showers and thunderstorms before 3pm. Partly sunny, with a high near 81. Northeast wind 3 to 8 mph.
Wednesday Night
Mostly clear, with a low around 60. East wind around 6 mph becoming calm.
Thursday
Mostly sunny, with a high near 83. East northeast wind 8 to 11 mph, with gusts as high as 15 mph.
Thursday Night
Mostly cloudy, with a low around 59. East wind around 9 mph.
Friday
Partly sunny, with a high near 79. East wind around 8 mph.
Friday Night
Partly cloudy, with a low around 59. East wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Blue Mound IL
 39.74°N 89.12°W (Elev. 600 ft)
Last Update:
1:26 am CDT May 27, 2026
Forecast Valid:
1am CDT May 27, 2026-6pm CDT Jun 2, 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