National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

35°F

2°C

Humidity 48%
Wind Speed Calm
Barometer 30.01 in (1016.7 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Last update 5 Dec 11:53 am CST
Extended Forecast for

Lebanon IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 38. South wind 6 to 8 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 28. South wind 5 to 8 mph becoming west after midnight.

    Low: 28 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Partly sunny, with a high near 40. Light and variable wind.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 30. Southeast wind 3 to 5 mph.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A slight chance of rain, mixing with snow after 9am, then gradually ending. Mostly cloudy, with a high near 39. Southeast wind 5 to 14 mph becoming northwest in the morning. Chance of precipitation is 20%.

    High: 39 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 38. South wind 6 to 8 mph.
Tonight
Increasing clouds, with a low around 28. South wind 5 to 8 mph becoming west after midnight.
Saturday
Partly sunny, with a high near 40. Light and variable wind.
Saturday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 30. Southeast wind 3 to 5 mph.
Sunday
A slight chance of rain, mixing with snow after 9am, then gradually ending. Mostly cloudy, with a high near 39. Southeast wind 5 to 14 mph becoming northwest in the morning. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 15.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 46.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lebanon IL
 38.61°N 89.81°W (Elev. 463 ft)
Last Update:
10:26 am CST Dec 5, 2025
Forecast Valid:
12pm CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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