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.

Partly Cloudy

27°F

-3°C

Humidity 43%
Wind Speed N 8 mph
Barometer 30.27 in (1025.7 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 29 Jan 2:53 pm CST
Extended Forecast for

4 Miles SW Waterloo IL

  • This Afternoon

    This Afternoon: A 20 percent chance of snow after 4pm. Mostly cloudy, with a high near 27. Northeast wind around 7 mph.

    High: 27 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Snow likely, mainly before 10pm. Cloudy, with a low around 8. North wind 5 to 7 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 8 °F

    Snow Likely
    then Chance
    Snow

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. North wind 5 to 11 mph.

    High: 18 °F

    Cold

  • Friday Night

    Friday Night: Cloudy, then gradually becoming partly cloudy, with a low around 4. Wind chill values as low as -10. Northwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 4 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny and cold, with a high near 19. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 19 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of snow after 4pm. Mostly cloudy, with a high near 27. Northeast wind around 7 mph.
Tonight
Snow likely, mainly before 10pm. Cloudy, with a low around 8. North wind 5 to 7 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday
Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. North wind 5 to 11 mph.
Friday Night
Cloudy, then gradually becoming partly cloudy, with a low around 4. Wind chill values as low as -10. Northwest wind around 10 mph, with gusts as high as 22 mph.
Saturday
Sunny and cold, with a high near 19. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 1.
Sunday
Partly sunny, with a high near 29.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 36.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Mostly cloudy, with a high near 37.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Mostly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Waterloo IL
 38.29°N 90.19°W (Elev. 633 ft)
Last Update:
2:07 pm CST Jan 29, 2026
Forecast Valid:
3pm CST Jan 29, 2026-6pm CST Feb 5, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation