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.

Light Rain Fog/Mist

51°F

11°C

Humidity 92%
Wind Speed N 9 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 49°F (9°C)
Visibility 5.00 mi
Wind Chill48°F (9°C)
Last update 1 Apr 9:53 am CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Today

    Today: Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 68. East wind 5 to 8 mph. Chance of precipitation is 90%.

    High: 68 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 62. East wind 8 to 14 mph becoming south after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. Breezy, with a south wind 17 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 70%.

    High: 77 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 63. South wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. South wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 55. Chance of precipitation is 90%.

    Low: 55 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 65. Chance of precipitation is 80%.

    High: 65 °F

    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 39.

    Low: 39 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 68. East wind 5 to 8 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely before 2am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 62. East wind 8 to 14 mph becoming south after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 77. Breezy, with a south wind 17 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 63. South wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80. South wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 55. Chance of precipitation is 90%.
Saturday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 65. Chance of precipitation is 80%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 57.
Sunday Night
Clear, with a low around 35.
Monday
Sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 62.
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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:
9:41 am CDT Apr 1, 2026
Forecast Valid:
10am CDT Apr 1, 2026-6pm CDT Apr 7, 2026
 
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