Severe Weather and Heavy Rain from the Ohio Valley to the Mid-Atlantic; Heat Persists in the South-Central U.S.

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected across portions of the Ohio Valley into southern Mid-Atlantic and Carolinas. Rounds of strong thunderstorms are expected to develop across the northern and central Plains. Sweltering heat remains most persistent across the South-Central Plains and Lower/Middle Mississippi Valley through next week. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

99°F

37°C

Humidity 41%
Wind Speed NW 5 mph
Barometer 29.92 in (1012.4 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index108°F (42°C)
Last update 5 Sep 12:53 pm CDT
Extended Forecast for

Lebanon IL

Extreme Heat Warning September 5, 03:15pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 5, 03:15pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • This Afternoon

    High: 100 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Calm wind becoming northeast around 6 mph after midnight.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 90. Northeast wind 6 to 10 mph.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. Northeast wind 5 to 8 mph.

    Low: 64 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 89. East wind 3 to 7 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms. Mostly sunny and hot, with a high near 100. Heat index values as high as 109. North wind around 6 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 71. Calm wind becoming northeast around 6 mph after midnight.
Sunday
Sunny, with a high near 90. Northeast wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 64. Northeast wind 5 to 8 mph.
Labor Day
Sunny, with a high near 89. East wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 95.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
Sunny and hot, with a high near 99.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 71.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 65.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 87.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 64.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Lebanon IL
 38.61°N 89.81°W (Elev. 463 ft)
2:56 pm CDT Sep 5, 2026
3pm CDT Sep 5, 2026-6pm CDT Sep 12, 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