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

56°F

13°C

Humidity 70%
Wind Speed SE 7 mph
Barometer 30.13 in (1020.0 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 14 May 7:53 am CDT
Extended Forecast for

4 Miles SSE Waterloo IL

  • Today

    Today: Sunny, with a high near 74. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 54. South wind 7 to 10 mph.

    Low: 54 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms likely, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 81. South wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely then
    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. South wind around 9 mph.

    Low: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. South wind around 10 mph. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy.

    High: 88 °F

    Sunny then
    Chance
    T-storms and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 74. Calm wind becoming southeast 5 to 7 mph in the morning.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 54. South wind 7 to 10 mph.
Friday
Showers and thunderstorms likely, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 81. South wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. South wind around 9 mph.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84. South wind around 10 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 68.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 50%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 82. Chance of precipitation is 70%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Waterloo IL
 38.28°N 90.13°W (Elev. 656 ft)
Last Update:
6:20 am CDT May 14, 2026
Forecast Valid:
8am CDT May 14, 2026-6pm CDT May 20, 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