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.

A Few Clouds

72°F

22°C

Humidity 43%
Wind Speed SW 7 mph
Barometer 29.95 in (1013.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 12 May 10:53 pm CDT
Extended Forecast for

4 Miles W Waterloo IL

  • Tonight

    Tonight: A slight chance of showers between midnight and 1am. Mostly cloudy early, then clearing, with a low around 58. Southwest wind around 8 mph becoming northwest after midnight. Chance of precipitation is 20%.

    Low: 58 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 75. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 48. North wind 5 to 8 mph becoming calm in the evening.

    Low: 48 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 57. Southeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

    Low: 57 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

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

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.

    Low: 67 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers between midnight and 1am. Mostly cloudy early, then clearing, with a low around 58. Southwest wind around 8 mph becoming northwest after midnight. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 75. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Clear, with a low around 48. North wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 75. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 57. Southeast wind 9 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Friday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 88.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Saturday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 67.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 90. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Waterloo IL
 38.33°N 90.24°W (Elev. 541 ft)
Last Update:
9:21 pm CDT May 12, 2026
Forecast Valid:
11pm CDT May 12, 2026-6pm CDT May 19, 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