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

Washington Regional Airport (KFYG)

Lat: 38.59°NLon: 90.99°WElev: 489ft.

Mostly Cloudy

34°F

1°C

Humidity 32%
Wind Speed Calm
Barometer 30.23 in
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Last update 28 Jan 5:35 pm CST
Extended Forecast for

Marthasville MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 12. Light and variable wind.

    Low: 12 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 25. Northeast wind 3 to 7 mph.

    High: 25 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7. Northeast wind around 5 mph becoming calm in the evening.

    Low: 7 °F

    Chance Snow

  • Friday

    Friday: Partly sunny, with a high near 21. Calm wind becoming north 5 to 8 mph in the afternoon.

    High: 21 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 3. North wind around 6 mph.

    Low: 3 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny and cold, with a high near 19.

    High: 19 °F

    Cold

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 1.

    Low: 1 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 12. Light and variable wind.
Thursday
Mostly cloudy, with a high near 25. Northeast wind 3 to 7 mph.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 7. Northeast wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 21. Calm wind becoming north 5 to 8 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 3. North wind around 6 mph.
Saturday
Sunny and cold, with a high near 19.
Saturday Night
Partly cloudy, with a low around 1.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Partly sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
A 20 percent chance of rain. Mostly cloudy, with a high near 41.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marthasville MO
 38.62°N 91.06°W (Elev. 476 ft)
Last Update:
5:36 pm CST Jan 28, 2026
Forecast Valid:
5pm CST Jan 28, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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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