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

43°F

6°C

Humidity 68%
Wind Speed S 3 mph
Barometer 30.24 in (1024.2 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 8 Apr 6:53 am CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Today

    Today: Mostly sunny, with a high near 73. South wind 7 to 15 mph, with gusts as high as 25 mph.

    High: 73 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. South wind around 10 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78. South wind around 10 mph.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. South wind 8 to 10 mph.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. South wind 7 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%.

    High: 74 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 73. South wind 7 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 53. South wind around 10 mph.
Thursday
Sunny, with a high near 78. South wind around 10 mph.
Thursday Night
Partly cloudy, with a low around 57. South wind 8 to 10 mph.
Friday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 74. South wind 7 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 75. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
Partly sunny, with a high near 80.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 65.
Monday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 80. Chance of precipitation is 60%.
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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:
5:21 am CDT Apr 8, 2026
Forecast Valid:
7am CDT Apr 8, 2026-6pm CDT Apr 14, 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