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 >

Current conditions at

Olney-Noble Airport (KOLY)

Lat: 38.72°NLon: 88.18°WElev: 479ft.

Partly Cloudy

76°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 30.23 in
Dewpoint 76°F (24°C)
Visibility 7.00 mi
Heat Index75°F (24°C)
Last update 16 Sep 7:10 pm CDT
Extended Forecast for

Calhoun IL

Heat Advisory until September 17, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until September 17, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Tonight

    Low: 74 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Heat index values as high as 102. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72. Calm wind becoming northeast around 5 mph after midnight.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy through mid morning, then becoming sunny, with a high near 94. East northeast wind 3 to 6 mph.

    High: 94 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 70. East northeast wind 5 to 7 mph becoming southeast after midnight.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 98. South southeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 15 mph.

    High: 98 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 72. South wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers after 1pm.  Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 74. Light south southwest wind.
Thursday
Sunny and hot, with a high near 98. Heat index values as high as 102. Light and variable wind becoming west 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 72. Calm wind becoming northeast around 5 mph after midnight.
Friday
Mostly cloudy through mid morning, then becoming sunny, with a high near 94. East northeast wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 70. East northeast wind 5 to 7 mph becoming southeast after midnight.
Saturday
Sunny and hot, with a high near 98. South southeast wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Partly cloudy, with a low around 72. South wind around 6 mph.
Sunday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Partly sunny, with a high near 90.
Monday Night
A chance of showers. Mostly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
Calhoun IL
 38.66°N 88.04°W (Elev. 509 ft)
6:06 pm CDT Sep 16, 2026
7pm CDT Sep 16, 2026-6pm CDT Sep 23, 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