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

13°F

-11°C

Humidity 56%
Wind Speed SW 3 mph
Barometer 30.45 in (1031.7 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Last update 20 Jan 12:53 am CST
Extended Forecast for

Lemay MO

  • Overnight

    Overnight: Mostly clear, with a low around 13. Light southwest wind.

    Low: 13 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 39. Light south wind increasing to 5 to 9 mph in the morning.

    High: 39 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 31. South wind 8 to 11 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 46. West wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 46 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 25. West wind around 6 mph becoming northwest after midnight.

    Low: 25 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 20.

    High: 20 °F

    Cold

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 2.

    Low: 2 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 13. Light southwest wind.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 39. Light south wind increasing to 5 to 9 mph in the morning.
Tuesday Night
Increasing clouds, with a low around 31. South wind 8 to 11 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 46. West wind 6 to 10 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 25. West wind around 6 mph becoming northwest after midnight.
Thursday
Mostly sunny, with a high near 39.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
Mostly cloudy and cold, with a high near 20.
Friday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 2.
Saturday
A 30 percent chance of snow, mainly after noon. Mostly cloudy and cold, with a high near 14.
Saturday Night
A 30 percent chance of snow. Partly cloudy, with a low around 5.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
Mostly clear, with a low around 11.
Monday
Sunny, with a high near 35.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lemay MO
 38.53°N 90.29°W (Elev. 456 ft)
Last Update:
10:51 pm CST Jan 19, 2026
Forecast Valid:
1am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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