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.

Mostly Cloudy

40°F

4°C

Humidity 58%
Wind Speed Calm
Barometer 29.67 in (1004.9 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 24 Feb 11:53 pm CST
Extended Forecast for

4 Miles SW Waterloo IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 37. Southwest wind 5 to 8 mph becoming northwest.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 52. Light and variable wind becoming north around 5 mph in the afternoon.

    High: 52 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Rain likely, mainly between 1am and 5am. Mostly cloudy, with a low around 34. Northeast wind around 6 mph. Chance of precipitation is 60%.

    Low: 34 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 54. East wind 3 to 6 mph.

    High: 54 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Calm wind becoming south around 6 mph after midnight.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. Southwest wind 5 to 8 mph becoming northwest.
Wednesday
Mostly cloudy, with a high near 52. Light and variable wind becoming north around 5 mph in the afternoon.
Wednesday Night
Rain likely, mainly between 1am and 5am. Mostly cloudy, with a low around 34. Northeast wind around 6 mph. Chance of precipitation is 60%.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 54. East wind 3 to 6 mph.
Thursday Night
Mostly clear, with a low around 34. Calm wind becoming south around 6 mph after midnight.
Friday
Sunny, with a high near 68.
Friday Night
Mostly clear, with a low around 43.
Saturday
Sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain after midnight. Partly cloudy, with a low around 33.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 48.
Sunday Night
Rain and snow likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Monday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 31.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 48.
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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:
12:31 am CST Feb 25, 2026
Forecast Valid:
12am CST Feb 25, 2026-6pm CST Mar 3, 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