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

29°F

-2°C

Humidity 75%
Wind Speed NE 5 mph
Barometer 30.01 in (1016.7 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 3 Jan 4:53 am CST
Extended Forecast for

Madison IL

  • Overnight

    Overnight: A chance of sprinkles and flurries. Cloudy, with a low around 29. North wind around 5 mph.

    Low: 29 °F

    Chance
    Sprinkles/Flurries

  • Saturday

    Saturday: A chance of sprinkles and flurries before 7am. Cloudy through mid morning, then gradual clearing, with a high near 40. North wind 5 to 8 mph.

    High: 40 °F

    Chance
    Sprinkles/Flurries
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. North wind around 6 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 41. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 41 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. South wind around 7 mph.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of sprinkles and flurries. Cloudy, with a low around 29. North wind around 5 mph.
Saturday
A chance of sprinkles and flurries before 7am. Cloudy through mid morning, then gradual clearing, with a high near 40. North wind 5 to 8 mph.
Saturday Night
Mostly clear, with a low around 24. North wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 41. Calm wind becoming southeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 31. South wind around 7 mph.
Monday
Sunny, with a high near 58.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 48.
Thursday
Rain likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 50.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Madison IL
 38.68°N 90.14°W (Elev. 407 ft)
Last Update:
3:51 am CST Jan 3, 2026
Forecast Valid:
5am CST Jan 3, 2026-6pm CST Jan 9, 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