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.

Fog/Mist

53°F

12°C

Humidity 89%
Wind Speed Calm
Barometer 30.03 in (1017.1 mb)
Dewpoint 50°F (10°C)
Visibility 6.00 mi
Last update 20 Nov 11:54 am CST
Extended Forecast for

Byrnes Mill MO

  • This Afternoon

    This Afternoon: A slight chance of rain before 3pm, then a slight chance of rain after 5pm. Cloudy, with a high near 57. Light southeast wind. Chance of precipitation is 20%.

    High: 57 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Rain and thunderstorms likely before midnight, then rain and possibly a thunderstorm between midnight and 3am, then rain after 3am. Patchy fog after 10pm. Low around 52. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 100%.

    Low: 52 °F

    Rain Likely
    and Patchy
    Fog then Rain
    and Patchy
    Fog

  • Friday

    Friday: Rain and possibly a thunderstorm. Patchy fog before 10am. High near 60. East wind 5 to 7 mph. Chance of precipitation is 100%.

    High: 60 °F

    Rain and
    Patchy Fog
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain, mainly before midnight. Low around 44. North wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 80%.

    Low: 44 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 59. Light north wind.

    High: 59 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday

    Monday: Rain likely, mainly after noon. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Rain Likely

Detailed Forecast

This Afternoon
A slight chance of rain before 3pm, then a slight chance of rain after 5pm. Cloudy, with a high near 57. Light southeast wind. Chance of precipitation is 20%.
Tonight
Rain and thunderstorms likely before midnight, then rain and possibly a thunderstorm between midnight and 3am, then rain after 3am. Patchy fog after 10pm. Low around 52. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 100%.
Friday
Rain and possibly a thunderstorm. Patchy fog before 10am. High near 60. East wind 5 to 7 mph. Chance of precipitation is 100%.
Friday Night
Rain, mainly before midnight. Low around 44. North wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 80%.
Saturday
Mostly sunny, with a high near 59. Light north wind.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 44.
Monday
Rain likely, mainly after noon. Mostly cloudy, with a high near 58. Chance of precipitation is 60%.
Monday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 47. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 50.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Byrnes Mill MO
 38.45°N 90.58°W (Elev. 525 ft)
Last Update:
10:56 am CST Nov 20, 2025
Forecast Valid:
12pm CST Nov 20, 2025-6pm CST Nov 26, 2025
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation