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

57°F

14°C

Humidity 64%
Wind Speed S 8 mph
Barometer 29.72 in (1006.4 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 14 Mar 11:53 pm CDT
Extended Forecast for

4 Miles SW Waterloo IL

Wind Advisory March 15, 10:00am until March 16, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Increasing clouds, with a low around 55. South wind 11 to 17 mph, with gusts as high as 28 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3pm. High near 66. Breezy, with a south wind 22 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 90%.

    High: 66 °F

    Breezy.
    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain before 2am, then a slight chance of snow between 2am and 3am. Low around 21. Breezy, with a northwest wind 24 to 26 mph, with gusts as high as 44 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Breezy. Rain
    then Slight
    Chance Snow

  • Monday

    Monday: Partly sunny, with a high near 31. Blustery, with a northwest wind 21 to 25 mph, with gusts as high as 38 mph.

    High: 31 °F

    Partly Sunny
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 14. Northwest wind 10 to 17 mph, with gusts as high as 28 mph.

    Low: 14 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 55. South wind 11 to 17 mph, with gusts as high as 28 mph.
Sunday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 3pm. High near 66. Breezy, with a south wind 22 to 24 mph, with gusts as high as 41 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 2am, then a slight chance of snow between 2am and 3am. Low around 21. Breezy, with a northwest wind 24 to 26 mph, with gusts as high as 44 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday
Partly sunny, with a high near 31. Blustery, with a northwest wind 21 to 25 mph, with gusts as high as 38 mph.
Monday Night
Mostly clear, with a low around 14. Northwest wind 10 to 17 mph, with gusts as high as 28 mph.
Tuesday
Mostly sunny, with a high near 39.
Tuesday Night
A slight chance of rain and snow after 1am. Mostly cloudy, with a low around 32. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 73.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 78.
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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:
11:16 pm CDT Mar 14, 2026
Forecast Valid:
11pm CDT Mar 14, 2026-6pm CDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation