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 S De Young PA

  • Overnight

    Overnight: Clear, with a low around 39. South wind around 6 mph.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 45. Southwest wind around 6 mph.

    Low: 45 °F

    Clear

  • Tuesday

    Tuesday: A slight chance of showers after 2pm. Partly sunny, with a high near 65. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 65 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers before 8pm, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 55. 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: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am, then showers between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 66. 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 5am, then a chance of rain and snow showers. Low around 29. Chance of precipitation is 80%.

    Low: 29 °F

    Showers then
    Rain/Snow

  • Thursday

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

    High: 35 °F

    Chance Snow
    Showers then
    Mostly Sunny

  • Thursday Night

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

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 39. South wind around 6 mph.
Monday
Sunny, with a high near 62. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.
Monday Night
Clear, with a low around 45. Southwest wind around 6 mph.
Tuesday
A slight chance of showers after 2pm. Partly sunny, with a high near 65. Southwest wind 5 to 8 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers before 8pm, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 55. 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
A chance of showers and thunderstorms before 8am, then showers between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 66. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Rain showers before 5am, then a chance of rain and snow showers. Low around 29. Chance of precipitation is 80%.
Thursday
A chance of snow showers before 8am. Partly sunny, with a high near 35. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 24.
Friday
A chance of snow showers between 8am and 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
Friday Night
Rain and snow showers likely. Mostly cloudy, with a low around 24. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 40.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 40%.
Sunday
Rain and snow showers likely. Cloudy, with a high near 51. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S De Young PA
 41.53°N 78.91°W (Elev. 1831 ft)
Last Update:
2:21 am EDT Mar 9, 2026
Forecast Valid:
3am EDT Mar 9, 2026-6pm EDT Mar 15, 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