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.

A Few Clouds

46°F

8°C

Humidity 89%
Wind Speed W 9 mph
Barometer 29.75 in (1007.3 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 14 Jan 2:53 am CST
Extended Forecast for

Lebanon IL

  • Overnight

    Overnight: Cloudy, with a low around 38. West wind 9 to 13 mph, with gusts as high as 26 mph.

    Low: 38 °F

    Cloudy

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a temperature falling to around 29 by 5pm. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 37 mph.

    High: 39 °F⇓

    Gradual
    Clearing and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 18. Northwest wind 9 to 16 mph, with gusts as high as 28 mph.

    Low: 18 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 33. Northwest wind around 7 mph becoming south in the afternoon.

    High: 33 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a temperature rising to around 31 by 1am. South wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 26 °F⇑

    Chance Snow

  • Friday

    Friday: Partly sunny, with a high near 44. Breezy.

    High: 44 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 38. West wind 9 to 13 mph, with gusts as high as 26 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a temperature falling to around 29 by 5pm. Breezy, with a northwest wind 14 to 22 mph, with gusts as high as 37 mph.
Wednesday Night
Mostly clear, with a low around 18. Northwest wind 9 to 16 mph, with gusts as high as 28 mph.
Thursday
Increasing clouds, with a high near 33. Northwest wind around 7 mph becoming south in the afternoon.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a temperature rising to around 31 by 1am. South wind 6 to 11 mph, with gusts as high as 21 mph.
Friday
Partly sunny, with a high near 44. Breezy.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 28.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 15.
M.L.King Day
Mostly sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Sunny, with a high near 34.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lebanon IL
 38.63°N 89.81°W (Elev. 449 ft)
Last Update:
3:16 am CST Jan 14, 2026
Forecast Valid:
3am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
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