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.

Fair

41°F

5°C

Humidity 60%
Wind Speed Calm
Barometer 30.04 in (1017.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 28 Feb 3:53 am CST
Extended Forecast for

Madison IL

  • Today

    Today: A 30 percent chance of rain, mainly between 1pm and 5pm. Mostly sunny, with a high near 65. Light and variable wind becoming east 5 to 7 mph in the morning.

    High: 65 °F

    Mostly Sunny
    then Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 31. South wind 5 to 10 mph becoming north in the evening.

    Low: 31 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 46. Northeast wind around 10 mph.

    High: 46 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Snow likely before 3am, then rain and snow likely. Cloudy, with a low around 32. Northeast wind around 9 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 32 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 44. East wind 8 to 10 mph. Chance of precipitation is 40%.

    High: 44 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 38. Chance of precipitation is 80%.

    Low: 38 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 60. Chance of precipitation is 90%.

    High: 60 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, with thunderstorms also possible after midnight. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain, mainly between 1pm and 5pm. Mostly sunny, with a high near 65. Light and variable wind becoming east 5 to 7 mph in the morning.
Tonight
A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 31. South wind 5 to 10 mph becoming north in the evening.
Sunday
Increasing clouds, with a high near 46. Northeast wind around 10 mph.
Sunday Night
Snow likely before 3am, then rain and snow likely. Cloudy, with a low around 32. Northeast wind around 9 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday
A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 44. East wind 8 to 10 mph. Chance of precipitation is 40%.
Monday Night
Rain. Low around 38. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 60. Chance of precipitation is 90%.
Tuesday Night
Rain, with thunderstorms also possible after midnight. Low around 50. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 70%.
Wednesday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 70.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 55.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
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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:
3:57 am CST Feb 28, 2026
Forecast Valid:
4am CST Feb 28, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation