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

28°F

-2°C

Humidity 80%
Wind Speed W 9 mph
Barometer 30.01 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 3 Dec 10:55 pm EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Tonight

    Tonight: A chance of snow, mainly after 3am. Mostly cloudy, with a low around 24. West wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 24 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A chance of snow showers, mainly before noon. Mostly cloudy, with a high near 30. West wind 9 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 40%.

    High: 30 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 9. Northwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 21 mph.

    Low: 9 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of light snow after 1pm. Mostly sunny, with a high near 27. South wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 27 °F

    Mostly Sunny
    then Slight
    Chance Light
    Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20. Light south wind.

    Low: 20 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of snow after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A chance of snow before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
A chance of snow, mainly after 3am. Mostly cloudy, with a low around 24. West wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Thursday
A chance of snow showers, mainly before noon. Mostly cloudy, with a high near 30. West wind 9 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 9. Northwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 21 mph.
Friday
A slight chance of light snow after 1pm. Mostly sunny, with a high near 27. South wind 3 to 7 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 20. Light south wind.
Saturday
Partly sunny, with a high near 36.
Saturday Night
Mostly cloudy, with a low around 26.
Sunday
A chance of snow after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 30%.
Sunday Night
A chance of snow before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 25.
Monday Night
Partly cloudy, with a low around 10.
Tuesday
A chance of snow. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Tuesday Night
Snow likely. Cloudy, with a low around 23. Chance of precipitation is 60%.
Wednesday
Snow likely. Mostly cloudy, with a high near 36. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
Last Update:
7:05 pm EST Dec 3, 2025
Forecast Valid:
10pm EST Dec 3, 2025-6pm EST Dec 10, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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