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

27°F

-3°C

Humidity 80%
Wind Speed Calm
Barometer 29.88 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 5 Dec 10:35 pm EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: Cloudy, with a low around 22. South wind 3 to 5 mph.

    Low: 22 °F

    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 35. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.

    High: 35 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. West wind 3 to 6 mph.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of snow showers after 1pm. Mostly cloudy, with a high near 33. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Sunday Night

    Sunday Night: A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 15. West wind 6 to 8 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: 15 °F

    Chance Snow
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow showers after 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.

    High: 30 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: A chance of snow showers. Cloudy, with a low around 26. Chance of precipitation is 50%.

    Low: 26 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
Cloudy, with a low around 22. South wind 3 to 5 mph.
Saturday
Mostly cloudy, with a high near 35. Southwest wind 6 to 8 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 25. West wind 3 to 6 mph.
Sunday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 33. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.
Sunday Night
A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 15. West wind 6 to 8 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Monday
Mostly sunny, with a high near 24.
Monday Night
Partly cloudy, with a low around 10.
Tuesday
A chance of snow showers after 1pm. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Tuesday Night
A chance of snow showers. Cloudy, with a low around 26. Chance of precipitation is 50%.
Wednesday
Snow showers. High near 37. Chance of precipitation is 80%.
Wednesday Night
Snow showers. Low around 26. Chance of precipitation is 90%.
Thursday
Snow showers likely. Mostly cloudy, with a high near 33. Chance of precipitation is 60%.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 50%.
Friday
A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
8:36 pm EST Dec 5, 2025
Forecast Valid:
10pm EST Dec 5, 2025-6pm EST Dec 12, 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