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.

Fair

12°F

-11°C

Humidity 62%
Wind Speed E 3 mph
Barometer 30.22 in
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Last update 8 Dec 10:15 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: Mostly clear, with a low around 7. Wind chill values as low as zero. Light and variable wind.

    Low: 7 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of snow showers, mainly between 3pm and 5pm. Increasing clouds, with a high near 30. Wind chill values as low as -5. South wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers between 7pm and 1am, then snow likely after 1am. Cloudy, with a low around 26. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 26 °F

    Slight Chance
    Snow Showers
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow before 10am, then snow, possibly mixed with rain between 10am and 4pm, then snow after 4pm. High near 36. Southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    High: 36 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow before 1am, then a chance of snow showers after 1am. Low around 23. West wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Snow

  • Thursday

    Thursday: A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 27 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: A chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.

    Low: 19 °F

    Chance Snow
    Showers

  • Friday

    Friday: A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 50%.

    High: 27 °F

    Chance Snow
    Showers

  • Friday Night

    Friday Night: Snow showers likely. Mostly cloudy, with a low around 17. Chance of precipitation is 70%.

    Low: 17 °F

    Snow Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 7. Wind chill values as low as zero. Light and variable wind.
Tuesday
A chance of snow showers, mainly between 3pm and 5pm. Increasing clouds, with a high near 30. Wind chill values as low as -5. South wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Tuesday Night
A slight chance of snow showers between 7pm and 1am, then snow likely after 1am. Cloudy, with a low around 26. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Wednesday
Snow before 10am, then snow, possibly mixed with rain between 10am and 4pm, then snow after 4pm. High near 36. Southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Wednesday Night
Snow before 1am, then a chance of snow showers after 1am. Low around 23. West wind around 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.
Friday
A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 50%.
Friday Night
Snow showers likely. Mostly cloudy, with a low around 17. Chance of precipitation is 70%.
Saturday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 24. Chance of precipitation is 60%.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 12. Chance of precipitation is 50%.
Sunday
A chance of snow showers. Mostly cloudy, with a high near 22. Chance of precipitation is 40%.
Sunday Night
Mostly cloudy, with a low around 8.
Monday
A chance of snow showers. Mostly cloudy, with a high near 24. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
7:05 pm EST Dec 8, 2025
Forecast Valid:
10pm EST Dec 8, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation