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.

Mostly Cloudy

49°F

9°C

Humidity 61%
Wind Speed NW 18 mph
Barometer 29.97 in (1015.0 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 6 Feb 12:53 pm CST
Extended Forecast for

4 Miles SW Waterloo IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 48. Breezy, with a north wind 15 to 20 mph, with gusts as high as 29 mph.

    High: 48 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 22. Northwest wind 6 to 13 mph, with gusts as high as 25 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 37. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 37 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26. Southeast wind 6 to 9 mph.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 54. South wind 6 to 9 mph.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 67.

    High: 67 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 48. Breezy, with a north wind 15 to 20 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 22. Northwest wind 6 to 13 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 37. Northeast wind around 6 mph becoming southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 26. Southeast wind 6 to 9 mph.
Sunday
Mostly sunny, with a high near 54. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 31.
Monday
Sunny, with a high near 61.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 67.
Tuesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 51.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 32.
Thursday
A 20 percent chance of rain. Mostly cloudy, with a high near 47.
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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:
12:26 pm CST Feb 6, 2026
Forecast Valid:
1pm CST Feb 6, 2026-6pm CST Feb 12, 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