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

75°F

24°C

Humidity 64%
Wind Speed S 9 mph
Barometer 29.92 in (1012.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 3 Apr 11:53 pm CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Overnight

    Overnight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 54. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    Low: 54 °F

    T-storms

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and 3pm. High near 65. West wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.

    High: 65 °F

    Showers then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. Northwest wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39. West wind around 6 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 54. South wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Saturday
Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and 3pm. High near 65. West wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 100%.
Saturday Night
Partly cloudy, with a low around 39. Northwest wind 8 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 59. Northwest wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 39. West wind around 6 mph.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 76.
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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:
10:26 pm CDT Apr 3, 2026
Forecast Valid:
12am CDT Apr 4, 2026-6pm CDT Apr 10, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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