Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

22°F

-6°C

Humidity 85%
Wind Speed S 6 mph
Barometer 30.39 in (1029.5 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 12 Jan 1:53 am CST
Extended Forecast for

4 Miles W Waterloo IL

  • Overnight

    Overnight: Clear, with a low around 21. South wind 3 to 6 mph.

    Low: 21 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 56. Southwest wind 6 to 10 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36. Southwest wind 6 to 8 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 63. West wind 8 to 14 mph, with gusts as high as 26 mph.

    High: 63 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers before midnight.  Mostly cloudy, with a low around 40. West wind 8 to 10 mph.

    Low: 40 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 33 by 5pm.

    High: 43 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 21. South wind 3 to 6 mph.
Monday
Sunny, with a high near 56. Southwest wind 6 to 10 mph.
Monday Night
Mostly clear, with a low around 36. Southwest wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 63. West wind 8 to 14 mph, with gusts as high as 26 mph.
Tuesday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 40. West wind 8 to 10 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 33 by 5pm.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Mostly sunny, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 31.
Saturday Night
Partly cloudy, with a low around 12.
Sunday
Sunny, with a high near 32.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Waterloo IL
 38.33°N 90.24°W (Elev. 541 ft)
2:41 am CST Jan 12, 2026
2am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
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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