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

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Overcast

27°F

-3°C

Humidity 89%
Wind Speed SW 5 mph
Barometer 30.12 in (1021.2 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 3 Dec 9:54 am CST
Extended Forecast for

Byrnes Mill MO

  • Today

    Today: A chance of sprinkles before 4pm, then a slight chance of rain between 4pm and 5pm, then a slight chance of rain and snow after 5pm. Cloudy, with a high near 41. Southwest wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 20%.

    High: 41 °F

    Cloudy then
    Slight Chance
    Rain/Snow

  • Tonight

    Tonight: A 40 percent chance of snow, mainly before 1am. Cloudy, with a low around 14. Light northwest wind becoming north 5 to 10 mph in the evening.

    Low: 14 °F

    Chance Snow

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 26. North wind around 6 mph becoming calm in the morning.

    High: 26 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 13. Calm wind.

    Low: 13 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 42. Light south wind.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

Detailed Forecast

Today
A chance of sprinkles before 4pm, then a slight chance of rain between 4pm and 5pm, then a slight chance of rain and snow after 5pm. Cloudy, with a high near 41. Southwest wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 20%.
Tonight
A 40 percent chance of snow, mainly before 1am. Cloudy, with a low around 14. Light northwest wind becoming north 5 to 10 mph in the evening.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 26. North wind around 6 mph becoming calm in the morning.
Thursday Night
Partly cloudy, with a low around 13. Calm wind.
Friday
Mostly sunny, with a high near 42. Light south wind.
Friday Night
Partly cloudy, with a low around 24.
Saturday
Partly sunny, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
Partly sunny, with a high near 38.
Sunday Night
Mostly cloudy, with a low around 22.
Monday
Partly sunny, with a high near 37.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Byrnes Mill MO
 38.43°N 90.58°W (Elev. 495 ft)
Last Update:
9:11 am CST Dec 3, 2025
Forecast Valid:
10am CST Dec 3, 2025-6pm CST Dec 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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