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.

Mostly Cloudy

72°F

22°C

Humidity 50%
Wind Speed S 5 mph
Barometer 29.91 in (1012.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 31 Mar 11:53 pm CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 61. Southwest wind 6 to 8 mph.

    Low: 61 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 4pm, then a chance of showers. Mostly cloudy, with a high near 79. Northeast wind 6 to 9 mph becoming south in the morning. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 65. South wind 10 to 16 mph, with gusts as high as 26 mph.

    Low: 65 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 77. Breezy, with a south wind 18 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.

    High: 77 °F

    Breezy.
    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 61. South wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    Low: 61 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.

    High: 65 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Increasing clouds, with a low around 61. Southwest wind 6 to 8 mph.
Wednesday
Showers and thunderstorms likely before 4pm, then a chance of showers. Mostly cloudy, with a high near 79. Northeast wind 6 to 9 mph becoming south in the morning. Chance of precipitation is 60%.
Wednesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 65. South wind 10 to 16 mph, with gusts as high as 26 mph.
Thursday
A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 77. Breezy, with a south wind 18 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 61. South wind 9 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 53. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 65. Chance of precipitation is 70%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Waterloo IL
 38.29°N 90.19°W (Elev. 633 ft)
Last Update:
9:56 pm CDT Mar 31, 2026
Forecast Valid:
12am CDT Apr 1, 2026-6pm CDT Apr 7, 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