National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

62°F

17°C

Humidity 38%
Wind Speed SE 8 mph
Barometer 30.28 in (1025.5 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 20 Apr 1:53 pm CDT
Extended Forecast for

5 Miles SSE Waterloo IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 67. Southeast wind around 7 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 51. Southeast wind around 8 mph becoming southwest after midnight.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. Southwest wind 7 to 10 mph.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Southwest wind 6 to 8 mph.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.

    High: 75 °F

    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 67. Southeast wind around 7 mph.
Tonight
Mostly clear, with a low around 51. Southeast wind around 8 mph becoming southwest after midnight.
Tuesday
Sunny, with a high near 77. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 53. Southwest wind 7 to 10 mph.
Wednesday
Sunny, with a high near 75. Southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 80.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.
Friday
Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 72.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Waterloo IL
 38.26°N 90.11°W (Elev. 597 ft)
Last Update:
1:26 pm CDT Apr 20, 2026
Forecast Valid:
2pm CDT Apr 20, 2026-6pm CDT Apr 26, 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