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

56°F

13°C

Humidity 46%
Wind Speed S 6 mph
Barometer 29.83 in (1009.9 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 18 Nov 4:53 am CST
Extended Forecast for

4 Miles WSW Waterloo IL

  • Today

    Today: A 50 percent chance of rain and thunderstorms, mainly before 2pm. Mostly cloudy, with a high near 72. South wind 6 to 9 mph becoming northwest in the afternoon.

    High: 72 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Increasing clouds, with a low around 46. North wind around 5 mph.

    Low: 46 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 62. North wind around 5 mph becoming calm in the morning.

    High: 62 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 49. Calm wind becoming southeast around 5 mph after midnight.

    Low: 49 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain likely and possibly a thunderstorm, then rain after noon. High near 62. South wind around 6 mph. Chance of precipitation is 80%.

    High: 62 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm, then rain after midnight. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Rain

  • Friday

    Friday: Rain. High near 59. Chance of precipitation is 80%.

    High: 59 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain
    then Slight
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

Detailed Forecast

Today
A 50 percent chance of rain and thunderstorms, mainly before 2pm. Mostly cloudy, with a high near 72. South wind 6 to 9 mph becoming northwest in the afternoon.
Tonight
Increasing clouds, with a low around 46. North wind around 5 mph.
Wednesday
Mostly cloudy, with a high near 62. North wind around 5 mph becoming calm in the morning.
Wednesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 49. Calm wind becoming southeast around 5 mph after midnight.
Thursday
Rain likely and possibly a thunderstorm, then rain after noon. High near 62. South wind around 6 mph. Chance of precipitation is 80%.
Thursday Night
Rain likely and possibly a thunderstorm, then rain after midnight. Low around 53. Chance of precipitation is 80%.
Friday
Rain. High near 59. Chance of precipitation is 80%.
Friday Night
A 50 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 61.
Sunday Night
Partly cloudy, with a low around 43.
Monday
A 20 percent chance of rain. Partly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Waterloo IL
 38.31°N 90.22°W (Elev. 623 ft)
Last Update:
5:51 am CST Nov 18, 2025
Forecast Valid:
6am CST Nov 18, 2025-6pm CST Nov 24, 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