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

31°F

-1°C

Humidity 89%
Wind Speed Calm
Barometer 30.07 in (1018.3 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 17 Nov 3:53 am CST
Extended Forecast for

4 Miles W Waterloo IL

  • Today

    Today: A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 59. Southeast wind 5 to 11 mph, with gusts as high as 22 mph.

    High: 59 °F

    Sunny then
    Slight Chance
    Showers

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 51 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms before noon, then a slight chance of showers. Mostly sunny, with a high near 74. South wind 7 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 40%.

    High: 74 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 47. North wind 3 to 6 mph.

    Low: 47 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 62. Light north wind.

    High: 62 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Slight Chance
    Rain then
    Chance Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 90%.

    High: 67 °F

    Rain

  • Thursday Night

    Thursday Night: Rain. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Rain

  • Friday

    Friday: Rain likely, mainly before noon. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Rain Likely

Detailed Forecast

Today
A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 59. Southeast wind 5 to 11 mph, with gusts as high as 22 mph.
Tonight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Southeast wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms before noon, then a slight chance of showers. Mostly sunny, with a high near 74. South wind 7 to 9 mph becoming northwest in the afternoon. Chance of precipitation is 40%.
Tuesday Night
Partly cloudy, with a low around 47. North wind 3 to 6 mph.
Wednesday
Mostly cloudy, with a high near 62. Light north wind.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 50.
Thursday
Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 90%.
Thursday Night
Rain. Low around 56. Chance of precipitation is 80%.
Friday
Rain likely, mainly before noon. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 45.
Saturday
Partly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 40.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 58.
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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:
3:16 am CST Nov 17, 2025
Forecast Valid:
4am CST Nov 17, 2025-6pm CST Nov 23, 2025
 
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