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

50°F

10°C

Humidity 86%
Wind Speed N 13 mph
Barometer 29.83 in (1010.2 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Wind Chill45°F (7°C)
Last update 5 May 3:53 pm CDT
Extended Forecast for

Waterloo IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. Steady temperature around 51. North wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 51 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 4am. Low around 44. North wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.

    Low: 44 °F

    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 59. North wind 6 to 10 mph.

    High: 59 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41. North wind around 6 mph becoming calm in the evening.

    Low: 41 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. Northwest wind 3 to 7 mph.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 74. Chance of precipitation is 20%.

    High: 74 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Steady temperature around 51. North wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Tonight
Showers and possibly a thunderstorm before 2am, then a slight chance of showers between 2am and 4am. Low around 44. North wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
Wednesday
Partly sunny, with a high near 59. North wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 41. North wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 65. Northwest wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 44.
Friday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 74. Chance of precipitation is 20%.
Friday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 52. Chance of precipitation is 50%.
Saturday
Sunny, with a high near 80.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 48.
Monday
Sunny, with a high near 71.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IL
 38.33°N 90.16°W (Elev. 600 ft)
Last Update:
3:36 pm CDT May 5, 2026
Forecast Valid:
4pm CDT May 5, 2026-6pm CDT May 12, 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