Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

33°F

1°C

Humidity 89%
Wind Speed Calm
Barometer 29.89 in (1012.4 mb)
Dewpoint 30°F (-1°C)
Visibility 9.00 mi
Last update 7 Jan 12:54 am CST
Extended Forecast for

Byrnes Mill MO

  • Overnight

    Overnight: Clear, with a steady temperature around 41. Calm wind.

    Low: 41 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 47. South wind around 6 mph.

    Low: 47 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Rain.  High near 65. South wind 6 to 11 mph, with gusts as high as 26 mph.  Chance of precipitation is 90%.

    High: 65 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of rain, mainly between 9pm and midnight.  Mostly cloudy, with a low around 48. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 50%.

    Low: 48 °F

    Chance
    Showers then
    Slight Chance
    Rain

  • Friday

    Friday: Mostly cloudy, with a high near 57.

    High: 57 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of rain.  Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Saturday Night

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

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a steady temperature around 41. Calm wind.
Wednesday
Sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 47. South wind around 6 mph.
Thursday
Rain. High near 65. South wind 6 to 11 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of rain, mainly between 9pm and midnight. Mostly cloudy, with a low around 48. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Friday
Mostly cloudy, with a high near 57.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 39.
Saturday
Partly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
Mostly sunny, with a high near 39.
Sunday Night
Mostly clear, with a low around 26.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Byrnes Mill MO
 38.43°N 90.55°W (Elev. 597 ft)
12:56 am CST Jan 7, 2026
1am CST Jan 7, 2026-6pm CST Jan 13, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database