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

68°F

20°C

Humidity 65%
Wind Speed S 5 mph
Barometer 29.66 in (1004.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 22 Mar 6:53 am CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Today

    Today: Increasing clouds, with a high near 90. Southwest wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph.

    High: 90 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 37. Breezy, with a north wind 14 to 23 mph, with gusts as high as 38 mph.

    Low: 37 °F

    Slight Chance
    T-storms and
    Breezy then
    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 56. North wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 56 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. Northeast wind around 6 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65. Southeast wind around 7 mph.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 90. Southwest wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 37. Breezy, with a north wind 14 to 23 mph, with gusts as high as 38 mph.
Monday
Increasing clouds, with a high near 56. North wind 9 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 38. Northeast wind around 6 mph.
Tuesday
Mostly sunny, with a high near 65. Southeast wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 45.
Wednesday
Partly sunny, with a high near 75.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 43.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 53.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 33.
Saturday
Mostly sunny, with a high near 56.
Basemap Options
Click map to change the forecast location
Loading map...
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:
4:16 am CDT Mar 22, 2026
Forecast Valid:
7am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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