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

21°F

-6°C

Humidity 68%
Wind Speed W 14 G 25 mph
Barometer 29.78 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 30 Dec 5:15 pm EST
Extended Forecast for

6 Miles ESE Sinnamahoning PA

  • This Afternoon

    This Afternoon: A slight chance of snow showers. Mostly cloudy, with a high near 24. West wind around 17 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

    High: 24 °F

    Slight Chance
    Snow Showers

  • Tonight

    Tonight: A slight chance of snow showers before 10pm, then a chance of snow showers after 11pm. Mostly cloudy, with a low around 18. West wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 18 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: A chance of snow showers before 9am, then a chance of snow showers after 2pm. Mostly cloudy, with a high near 27. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    High: 27 °F

    Chance Snow
    Showers

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before 1am. Low around 14. West wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 14 °F

    Snow Showers

  • New Year's Day

    New Year's Day: A slight chance of snow showers. Partly sunny, with a high near 21. West wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 21 °F

    Slight Chance
    Snow Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 26.

    High: 26 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A slight chance of snow showers. Mostly cloudy, with a high near 24. West wind around 17 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.
Tonight
A slight chance of snow showers before 10pm, then a chance of snow showers after 11pm. Mostly cloudy, with a low around 18. West wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Wednesday
A chance of snow showers before 9am, then a chance of snow showers after 2pm. Mostly cloudy, with a high near 27. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Wednesday Night
Snow showers, mainly before 1am. Low around 14. West wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
New Year's Day
A slight chance of snow showers. Partly sunny, with a high near 21. West wind around 11 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 14.
Friday
Mostly cloudy, with a high near 27.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
Mostly cloudy, with a high near 26.
Saturday Night
Mostly cloudy, with a low around 16.
Sunday
Partly sunny, with a high near 29.
Sunday Night
Mostly cloudy, with a low around 19.
Monday
A chance of snow showers. Mostly cloudy, with a high near 33. Chance of precipitation is 40%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Sinnamahoning PA
 41.35°N 77.94°W (Elev. 1998 ft)
Last Update:
1:51 pm EST Dec 30, 2025
Forecast Valid:
5pm EST Dec 30, 2025-6pm EST Jan 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation