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

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles SSE De Young PA

  • Tonight

    Tonight: Increasing clouds, with a low around 46. Southwest wind 5 to 8 mph.

    Low: 46 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A slight chance of showers between 2pm and 5pm. Mostly cloudy, with a high near 64. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 64 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers, with thunderstorms also possible after 5am. Increasing clouds, with a low around 56. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms before 11am, then showers between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 66. South wind 9 to 11 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 66 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 28. West wind 13 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 28 °F

    Showers then
    Rain/Snow

  • Thursday

    Thursday: A chance of snow showers, mainly before 8am. Partly sunny, with a high near 35. Chance of precipitation is 30%.

    High: 35 °F

    Chance Snow
    Showers

  • Thursday Night

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

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Snow showers likely before 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 41. Chance of precipitation is 70%.

    High: 41 °F

    Snow Showers
    Likely then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain likely, possibly mixed with snow showers, mainly before 8pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.

    Low: 25 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 46. Southwest wind 5 to 8 mph.
Tuesday
A slight chance of showers between 2pm and 5pm. Mostly cloudy, with a high near 64. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of showers, with thunderstorms also possible after 5am. Increasing clouds, with a low around 56. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms before 11am, then showers between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 66. South wind 9 to 11 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 28. West wind 13 to 15 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow showers, mainly before 8am. Partly sunny, with a high near 35. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Snow showers likely before 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 41. Chance of precipitation is 70%.
Friday Night
Rain likely, possibly mixed with snow showers, mainly before 8pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 39.
Saturday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 50%.
Sunday
A chance of rain and snow showers. Mostly cloudy, with a high near 53. Chance of precipitation is 50%.
Sunday Night
Rain and snow showers. Low around 25. Chance of precipitation is 80%.
Monday
A chance of rain and snow showers. Mostly cloudy, with a high near 32. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE De Young PA
 41.53°N 78.88°W (Elev. 1883 ft)
Last Update:
2:26 pm EDT Mar 9, 2026
Forecast Valid:
5pm EDT Mar 9, 2026-6pm EDT Mar 16, 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