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.

Fair

48°F

9°C

Humidity 50%
Wind Speed S 9 mph
Barometer 29.97 in (1015.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 12 Mar 9:53 pm CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Southwest wind 9 to 17 mph, with gusts as high as 30 mph.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 61. West wind 11 to 17 mph, with gusts as high as 26 mph.

    High: 61 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. Northwest wind around 6 mph becoming light and variable.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 67. Southeast wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 67 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 54. South wind 9 to 14 mph, with gusts as high as 24 mph.

    Low: 54 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain before 10am, then a chance of rain and thunderstorms between 10am and 1pm, then rain and possibly a thunderstorm after 1pm. High near 68. Breezy. Chance of precipitation is 90%.

    High: 68 °F

    Breezy.
    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain and snow before 1am, then a chance of snow. Some thunder is also possible. Low around 22. Blustery. Chance of precipitation is 80%.

    Low: 22 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: Partly sunny, with a high near 30. Blustery.

    High: 30 °F

    Partly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 13.

    Low: 13 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. Southwest wind 9 to 17 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 61. West wind 11 to 17 mph, with gusts as high as 26 mph.
Friday Night
Mostly clear, with a low around 36. Northwest wind around 6 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 67. Southeast wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 54. South wind 9 to 14 mph, with gusts as high as 24 mph.
Sunday
A chance of rain before 10am, then a chance of rain and thunderstorms between 10am and 1pm, then rain and possibly a thunderstorm after 1pm. High near 68. Breezy. Chance of precipitation is 90%.
Sunday Night
Rain and snow before 1am, then a chance of snow. Some thunder is also possible. Low around 22. Blustery. Chance of precipitation is 80%.
Monday
Partly sunny, with a high near 30. Blustery.
Monday Night
Mostly clear, with a low around 13.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
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:
10:36 pm CDT Mar 12, 2026
Forecast Valid:
10pm CDT Mar 12, 2026-6pm CDT Mar 19, 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