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

89°F

32°C

Humidity 36%
Wind Speed S 13 G 20 mph
Barometer 30.01 in (1015.6 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 30 Aug 3:54 pm CDT
Extended Forecast for

Taylorville IL

Heat Advisory August 31, 01:00pm until August 31, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 70. South wind around 8 mph, with gusts as high as 15 mph.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. South southwest wind 8 to 10 mph, with gusts as high as 16 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South southwest wind 6 to 8 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind 6 to 8 mph.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 76. South wind 3 to 7 mph.

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Southwest wind 6 to 8 mph.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. South wind 3 to 6 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

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

    High: 96 °F

    Hot

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 70. South wind around 8 mph, with gusts as high as 15 mph.
Monday
Sunny, with a high near 94. South southwest wind 8 to 10 mph, with gusts as high as 16 mph.
Monday Night
Mostly clear, with a low around 73. South southwest wind 6 to 8 mph.
Tuesday
Sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind 6 to 8 mph.
Tuesday Night
Clear, with a low around 76. South wind 3 to 7 mph.
Wednesday
Sunny and hot, with a high near 98. Southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 77. South wind 3 to 6 mph.
Thursday
Sunny and hot, with a high near 96.
Thursday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 74.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Taylorville IL
 39.5°N 89.25°W (Elev. 591 ft)
Last Update:
3:36 pm CDT Aug 30, 2026
Forecast Valid:
4pm CDT Aug 30, 2026-6pm CDT Sep 6, 2026
 
Forecast Discussion
 
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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