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

39°F

4°C

Humidity 65%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 13 Jan 1:15 am CST
Extended Forecast for

4 Miles SW Marthasville MO

  • Overnight

    Overnight: Mostly clear, with a low around 39. Light and variable wind becoming southwest 5 to 8 mph. Winds could gust as high as 21 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 65. West wind 8 to 14 mph, with gusts as high as 24 mph.

    High: 65 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly between 7pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 35. West wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 35 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 41. Breezy, with a northwest wind 13 to 21 mph, with gusts as high as 32 mph.

    High: 41 °F

    Decreasing
    Clouds and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 15. North wind 5 to 14 mph, with gusts as high as 24 mph.

    Low: 15 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 39. Light and variable wind becoming southwest 5 to 8 mph. Winds could gust as high as 21 mph.
Tuesday
Increasing clouds, with a high near 65. West wind 8 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
A 30 percent chance of rain, mainly between 7pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 35. West wind 7 to 11 mph, with gusts as high as 21 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 41. Breezy, with a northwest wind 13 to 21 mph, with gusts as high as 32 mph.
Wednesday Night
Mostly clear, with a low around 15. North wind 5 to 14 mph, with gusts as high as 24 mph.
Thursday
Mostly sunny, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 24.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 30.
Saturday Night
Partly cloudy, with a low around 8.
Sunday
Sunny, with a high near 28.
Sunday Night
Mostly clear, with a low around 11.
M.L.King Day
Mostly sunny, with a high near 36.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Marthasville MO
 38.58°N 91.11°W (Elev. 577 ft)
Last Update:
12:21 am CST Jan 13, 2026
Forecast Valid:
1am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
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