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 and Breezy

32°F

0°C

Humidity 41%
Wind Speed NW 23 G 31 mph
Barometer 30.46 in (1031.8 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 22 Feb 2:53 pm CST
Extended Forecast for

4 Miles SW Waterloo IL

  • Tonight

    Tonight: Mostly clear, with a low around 14. Northwest wind 14 to 16 mph, with gusts as high as 30 mph.

    Low: 14 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 31. Northwest wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Calm wind becoming south 5 to 9 mph after midnight.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. South wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. West wind 5 to 11 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Rain Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.

    High: 52 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 14. Northwest wind 14 to 16 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 31. Northwest wind 8 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 20. Calm wind becoming south 5 to 9 mph after midnight.
Tuesday
Mostly cloudy, with a high near 53. South wind 10 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 37. West wind 5 to 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 55.
Wednesday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 29.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 33.
Sunday
A slight chance of rain and snow. Partly sunny, with a high near 50. Chance of precipitation is 20%.
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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:
3:11 pm CST Feb 22, 2026
Forecast Valid:
3pm CST Feb 22, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation