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

71°F

22°C

Humidity 96%
Wind Speed NE 3 mph
Barometer 29.88 in (1011.3 mb)
Dewpoint 70°F (21°C)
Visibility 8.00 mi
Last update 14 Jun 1:53 am CDT
Extended Forecast for

Waterloo IL

  • Overnight

    Overnight: Isolated showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 20%.

    Low: 67 °F

    Isolated
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Scattered showers and thunderstorms, mainly between 1pm and 5pm. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 82. North wind 5 to 8 mph. Chance of precipitation is 30%.

    High: 82 °F

    Scattered
    T-storms and
    Patchy Fog

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. North wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 86. Light north wind.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 69. Light and variable wind.

    Low: 69 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.

    Low: 74 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Isolated showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 20%.
Saturday
Scattered showers and thunderstorms, mainly between 1pm and 5pm. Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 82. North wind 5 to 8 mph. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 67. North wind around 6 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 86. Light north wind.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 69. Light and variable wind.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 91. Chance of precipitation is 50%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Juneteenth
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 68.
Friday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IL
 38.33°N 90.16°W (Elev. 600 ft)
Last Update:
1:52 am CDT Jun 14, 2025
Forecast Valid:
2am CDT Jun 14, 2025-6pm CDT Jun 20, 2025
 
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