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.

Overcast

32°F

0°C

Humidity 80%
Wind Speed W 3 mph
Barometer 29.97 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 6 Dec 9:35 pm EST
Extended Forecast for

4 Miles SE Sinnamahoning PA

  • Tonight

    Tonight: Cloudy, with a low around 23. West wind 3 to 8 mph.

    Low: 23 °F

    Cloudy

  • Sunday

    Sunday: A chance of snow, mainly after 5pm. Mostly cloudy, with a high near 34. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A chance of snow, mainly before 7pm. Mostly cloudy, with a low around 14. Southwest wind 6 to 9 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    Low: 14 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 23. North wind 3 to 7 mph.

    High: 23 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8. Calm wind becoming south around 5 mph after midnight.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow after 1pm. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.

    High: 31 °F

    Partly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: A chance of snow after 1am. Cloudy, with a low around 27. Chance of precipitation is 50%.

    Low: 27 °F

    Cloudy then
    Chance Snow

  • Wednesday

    Wednesday: Rain and snow. High near 39. Chance of precipitation is 80%.

    High: 39 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow, mainly before 1am. Low around 27. Chance of precipitation is 80%.

    Low: 27 °F

    Snow

Detailed Forecast

Tonight
Cloudy, with a low around 23. West wind 3 to 8 mph.
Sunday
A chance of snow, mainly after 5pm. Mostly cloudy, with a high near 34. Calm wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.
Sunday Night
A chance of snow, mainly before 7pm. Mostly cloudy, with a low around 14. Southwest wind 6 to 9 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 23. North wind 3 to 7 mph.
Monday Night
Partly cloudy, with a low around 8. Calm wind becoming south around 5 mph after midnight.
Tuesday
A chance of snow after 1pm. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
Tuesday Night
A chance of snow after 1am. Cloudy, with a low around 27. Chance of precipitation is 50%.
Wednesday
Rain and snow. High near 39. Chance of precipitation is 80%.
Wednesday Night
Snow, mainly before 1am. Low around 27. Chance of precipitation is 80%.
Thursday
A chance of snow. Mostly cloudy, with a high near 32. Chance of precipitation is 50%.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 23. Chance of precipitation is 50%.
Friday
A chance of snow. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 15. Chance of precipitation is 50%.
Saturday
A chance of snow. Mostly cloudy, with a high near 24. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
9:11 pm EST Dec 6, 2025
Forecast Valid:
9pm EST Dec 6, 2025-6pm EST Dec 13, 2025
 
Forecast Discussion
 
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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