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

96°F

36°C

Humidity 39%
Wind Speed W 5 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 4 Sep 5:54 pm CDT
Extended Forecast for

Taylorville IL

Extreme Heat Warning September 4, 06:29pm until September 5, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 06:29pm until September 5, 07:00pm

    NOW until 7:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 99 °F

    Hot

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 69. Northeast wind around 6 mph.

    Low: 69 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 90. East northeast wind 6 to 9 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63. East wind 3 to 7 mph.

    Low: 63 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 90. East wind around 6 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. East wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 74. Light south southwest wind.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
Increasing clouds, with a low around 69. Northeast wind around 6 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 90. East northeast wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 63. East wind 3 to 7 mph.
Labor Day
Sunny, with a high near 90. East wind around 6 mph.
Monday Night
Mostly clear, with a low around 63. East wind 3 to 6 mph.
Tuesday
Sunny and hot, with a high near 96.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Taylorville IL
 39.52°N 89.27°W (Elev. 614 ft)
Last Update:
5:46 pm CDT Sep 4, 2026
Forecast Valid:
6pm CDT Sep 4, 2026-6pm CDT Sep 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