Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Mostly Cloudy

89°F

32°C

Humidity 50%
Wind Speed NW 5 mph
Barometer 30.23 in (1023.0 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 16 Sep 3:54 pm CDT
Extended Forecast for

Taylorville IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 93. Heat index values as high as 103. West wind around 5 mph.

    High: 93 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Light and variable wind.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 94. Heat index values as high as 102. Light and variable wind becoming west northwest around 6 mph in the morning.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 4am.  Partly cloudy, with a low around 69. Calm wind becoming east northeast around 5 mph after midnight.

    Low: 69 °F

    Mostly Clear
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before 1pm.  Mostly cloudy, then gradually becoming sunny, with a high near 91. Southeast wind 3 to 5 mph.

    High: 91 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. East southeast wind 3 to 7 mph.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 96. West southwest wind 7 to 9 mph, with gusts as high as 17 mph.

    High: 96 °F

    Hot

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 69. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 88. Chance of precipitation is 40%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 93. Heat index values as high as 103. West wind around 5 mph.
Tonight
Partly cloudy, with a low around 72. Light and variable wind.
Thursday
Sunny, with a high near 94. Heat index values as high as 102. Light and variable wind becoming west northwest around 6 mph in the morning.
Thursday Night
A 30 percent chance of showers after 4am. Partly cloudy, with a low around 69. Calm wind becoming east northeast around 5 mph after midnight.
Friday
A 30 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 91. Southeast wind 3 to 5 mph.
Friday Night
Mostly clear, with a low around 70. East southeast wind 3 to 7 mph.
Saturday
Mostly sunny and hot, with a high near 96. West southwest wind 7 to 9 mph, with gusts as high as 17 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 40%.
Sunday Night
A 40 percent chance of showers after 1am. Partly cloudy, with a low around 65.
Monday
A chance of showers. Partly sunny, with a high near 84.
Monday Night
A chance of showers. Mostly cloudy, with a low around 62.
Tuesday
Partly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
Taylorville IL
 39.52°N 89.27°W (Elev. 614 ft)
3:36 pm CDT Sep 16, 2026
3pm CDT Sep 16, 2026-6pm CDT Sep 22, 2026
 
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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