Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

63°F

17°C

Humidity 41%
Wind Speed SW 7 mph
Barometer 30.07 in (1018.2 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 19 Mar 10:53 am CDT
Extended Forecast for

4 Miles SW Waterloo IL

  • Today

    Today: A chance of sprinkles before 3pm.  Cloudy early, then gradual clearing, with a high near 73. South wind 5 to 7 mph.

    High: 73 °F

    Chance
    Sprinkles

  • Tonight

    Tonight: Mostly clear, with a low around 51. South wind around 6 mph.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81. West wind 5 to 11 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. West wind around 6 mph.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80. Light and variable wind becoming west around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of sprinkles before 3pm. Cloudy early, then gradual clearing, with a high near 73. South wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 51. South wind around 6 mph.
Friday
Sunny, with a high near 81. West wind 5 to 11 mph.
Friday Night
Partly cloudy, with a low around 52. West wind around 6 mph.
Saturday
Sunny, with a high near 80. Light and variable wind becoming west around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Mostly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Waterloo IL
 38.29°N 90.19°W (Elev. 633 ft)
10:36 am CDT Mar 19, 2026
11am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database