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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

31°F

-1°C

Humidity 52%
Wind Speed W 10 mph
Barometer 30.07 in (1018.8 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 18 Jan 11:53 pm CST
Extended Forecast for

Madison IL

Cold Weather Advisory January 19, 03:00am until January 19, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Overnight

    Overnight: Partly cloudy, with a low around 12. Northwest wind 10 to 16 mph, with gusts as high as 33 mph.

    Low: 12 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 21. Northwest wind 8 to 16 mph, with gusts as high as 29 mph.

    High: 21 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 14. Light and variable wind becoming west around 6 mph after midnight.

    Low: 14 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37. Southwest wind 3 to 8 mph.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. Southeast wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 12. Northwest wind 10 to 16 mph, with gusts as high as 33 mph.
M.L.King Day
Sunny, with a high near 21. Northwest wind 8 to 16 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 14. Light and variable wind becoming west around 6 mph after midnight.
Tuesday
Mostly sunny, with a high near 37. Southwest wind 3 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 29. Southeast wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly cloudy, with a high near 39.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 16.
Saturday
A 30 percent chance of snow. Mostly cloudy, with a high near 26.
Saturday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 7.
Sunday
A 20 percent chance of snow. Mostly sunny, with a high near 21.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
9:36 pm CST Jan 18, 2026
Forecast Valid:
12am CST Jan 19, 2026-6pm CST Jan 25, 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