Showers and Storms in the East; Dangerously Hot and Dry in the West

Scattered showers and storms are expected across portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Desert Southwest and Intermountain West. Hot, dry weather and increasing winds will allow elevated wildfire conditions to return to the northern Intermountain West, where air quality issues persist from ongoing fires. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

73°F

23°C

Humidity 94%
Wind Speed S 3 mph
Barometer 30.01 in (1015.7 mb)
Dewpoint 71°F (22°C)
Visibility 9.00 mi
Last update 9 Aug 4:53 am CDT
Extended Forecast for

Lebanon IL

Extreme Heat Warning August 9, 12:00pm until August 12, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  • Today

    Today: Sunny, with a high near 93. Heat index values as high as 105. Light south wind increasing to 8 to 13 mph in the morning.

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind 7 to 11 mph.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. Heat index values as high as 107. Southwest wind 6 to 9 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 77. South wind 6 to 9 mph.

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 96. Southwest wind 6 to 8 mph.

    High: 96 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 94.

    High: 94 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 1pm.  Mostly cloudy, with a high near 87. Chance of precipitation is 60%.

    High: 87 °F

    T-storms
    Likely

Detailed Forecast

Today
Sunny, with a high near 93. Heat index values as high as 105. Light south wind increasing to 8 to 13 mph in the morning.
Tonight
Mostly clear, with a low around 76. South wind 7 to 11 mph.
Monday
Sunny, with a high near 94. Heat index values as high as 107. Southwest wind 6 to 9 mph.
Monday Night
Partly cloudy, with a low around 77. South wind 6 to 9 mph.
Tuesday
Mostly sunny, with a high near 96. Southwest wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 77.
Wednesday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 94.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Thursday
Showers and thunderstorms likely, mainly before 1pm. Mostly cloudy, with a high near 87. Chance of precipitation is 60%.
Thursday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Lebanon IL
 38.61°N 89.81°W (Elev. 463 ft)
2:46 am CDT Aug 9, 2026
5am CDT Aug 9, 2026-6pm CDT Aug 15, 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