National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

38°F

3°C

Humidity 97%
Wind Speed Calm
Barometer 30.09 in (1019.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 10 Jan 2:53 am CST
Extended Forecast for

3 Miles WSW Millstadt IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. Calm wind becoming northwest around 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of rain, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 47. Northwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 47 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 25. Northwest wind 8 to 15 mph, with gusts as high as 26 mph.

    Low: 25 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. Calm wind becoming northwest around 5 mph.
Saturday
A 30 percent chance of rain, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 47. Northwest wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 25. Northwest wind 8 to 15 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 38. Northwest wind 5 to 15 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Mostly cloudy, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
Partly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Millstadt IL
 38.44°N 90.13°W (Elev. 650 ft)
Last Update:
3:16 am CST Jan 10, 2026
Forecast Valid:
3am CST Jan 10, 2026-6pm CST Jan 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation