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

84°F

29°C

Humidity 43%
Wind Speed Calm
Barometer 30.09 in
Dewpoint 59°F (15°C)
Visibility 8.00 mi
Heat Index84°F (29°C)
Last update 15 Oct 5:35 pm CDT
Extended Forecast for

Marthasville MO

  • Tonight

    Tonight: Mostly clear, with a low around 57. East wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 58. Southeast wind 3 to 8 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 85. South wind 3 to 8 mph.

    High: 85 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. South wind around 6 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 76. Chance of precipitation is 90%.

    High: 76 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Sunny, with a high near 65.

    High: 65 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 57. East wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84. Light east wind becoming southeast 5 to 10 mph in the morning.
Thursday Night
Increasing clouds, with a low around 58. Southeast wind 3 to 8 mph.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 85. South wind 3 to 8 mph.
Friday Night
A slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 62. South wind around 6 mph. Chance of precipitation is 20%.
Saturday
Showers and possibly a thunderstorm. High near 76. Chance of precipitation is 90%.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Sunday
A 20 percent chance of showers before 1pm. Sunny, with a high near 65.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 75.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 74.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 45.
Wednesday
Mostly sunny, with a high near 70.
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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:
4:16 pm CDT Oct 15, 2025
Forecast Valid:
5pm CDT Oct 15, 2025-6pm CDT Oct 22, 2025
 
Forecast Discussion
 
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Additional Resources

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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