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.

Fair with Haze

90°F

32°C

Humidity 49%
Wind Speed SE 14 mph
Barometer 29.82 in
Dewpoint 68°F (20°C)
Visibility 5.00 mi
Heat Index94°F (34°C)
Last update 1 Oct 2:55 pm CDT
Extended Forecast for

Marthasville MO

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 83. Southwest wind 7 to 9 mph.

    High: 83 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 60. Calm wind becoming north 5 to 8 mph after midnight. Chance of precipitation is 100%.

    Low: 60 °F

    Showers

  • Friday

    Friday: A 40 percent chance of showers, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 68. Northeast wind 8 to 10 mph, with gusts as high as 22 mph.

    High: 68 °F

    Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 50. Light northeast wind.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 72. Calm wind.

    High: 72 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 50.

    Low: 50 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 83. Southwest wind 7 to 9 mph.
Tonight
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 60. Calm wind becoming north 5 to 8 mph after midnight. Chance of precipitation is 100%.
Friday
A 40 percent chance of showers, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 68. Northeast wind 8 to 10 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 50. Light northeast wind.
Saturday
Sunny, with a high near 72. Calm wind.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Sunny, with a high near 76.
Sunday Night
Clear, with a low around 50.
Monday
Sunny, with a high near 71.
Monday Night
Clear, with a low around 46.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marthasville MO
 38.62°N 91.06°W (Elev. 476 ft)
Last Update:
1:26 pm CDT Oct 1, 2026
Forecast Valid:
3pm CDT Oct 1, 2026-6pm CDT Oct 8, 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