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

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

28°F

-2°C

Humidity 80%
Wind Speed W 5 mph
Barometer 30.40 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 29 Nov 7:35 am EST
Extended Forecast for

4 Miles ESE Sinnamahoning PA

  • Today

    Today: Mostly sunny, with a high near 36. West wind 5 to 7 mph becoming calm in the afternoon.

    High: 36 °F

    Mostly Sunny

  • Tonight

    Tonight: Snow showers likely, mainly after 1am. Cloudy, with a low around 27. Light southeast wind becoming south 9 to 14 mph in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Chance Snow
    Showers then
    Snow Showers
    Likely

  • Sunday

    Sunday: Snow showers before 10am, then snow showers, possibly mixed with rain. High near 41. South wind 11 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 41 °F

    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of snow showers. Mostly cloudy, with a low around 25. West wind around 10 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    Low: 25 °F

    Chance Snow
    Showers

  • Monday

    Monday: Partly sunny, with a high near 35. Northwest wind 5 to 8 mph becoming calm in the afternoon. Winds could gust as high as 21 mph.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Tuesday

    Tuesday: Snow showers. High near 34. Chance of precipitation is 80%.

    High: 34 °F

    Snow Showers

  • Tuesday Night

    Tuesday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.

    Low: 21 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 36. West wind 5 to 7 mph becoming calm in the afternoon.
Tonight
Snow showers likely, mainly after 1am. Cloudy, with a low around 27. Light southeast wind becoming south 9 to 14 mph in the evening. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday
Snow showers before 10am, then snow showers, possibly mixed with rain. High near 41. South wind 11 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Sunday Night
A chance of snow showers. Mostly cloudy, with a low around 25. West wind around 10 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 35. Northwest wind 5 to 8 mph becoming calm in the afternoon. Winds could gust as high as 21 mph.
Monday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Tuesday
Snow showers. High near 34. Chance of precipitation is 80%.
Tuesday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 34.
Wednesday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
A chance of snow showers. Mostly cloudy, with a high near 29. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Sinnamahoning PA
 41.36°N 78°W (Elev. 1598 ft)
Last Update:
7:05 am EST Nov 29, 2025
Forecast Valid:
7am EST Nov 29, 2025-6pm EST Dec 5, 2025
 
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