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.

Drizzle

52°F

11°C

Humidity 94%
Wind Speed S 3 mph
Barometer 29.81 in
Dewpoint 50°F (10°C)
Visibility 5.00 mi
Last update 26 Nov 1:15 am EST
Extended Forecast for

4 Miles ESE Sinnamahoning PA

  • Overnight

    Overnight: A chance of showers. Cloudy, with a low around 44. South wind around 6 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 58. Southwest wind 6 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of snow showers before 10pm. Mostly cloudy, with a low around 28. West wind 11 to 16 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: A chance of snow showers. Mostly cloudy, with a high near 35. West wind around 14 mph, with gusts as high as 38 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Snow showers likely. Mostly cloudy, with a low around 27. West wind around 15 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 27 °F

    Snow Showers
    Likely

  • Friday

    Friday: Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 36. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 36 °F

    Snow Showers
    Likely

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.

    Low: 26 °F

    Mostly Cloudy
    then Chance
    Snow Showers

Detailed Forecast

Overnight
A chance of showers. Cloudy, with a low around 44. South wind around 6 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers likely, mainly before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 58. Southwest wind 6 to 10 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of snow showers before 10pm. Mostly cloudy, with a low around 28. West wind 11 to 16 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.
Thanksgiving Day
A chance of snow showers. Mostly cloudy, with a high near 35. West wind around 14 mph, with gusts as high as 38 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers likely. Mostly cloudy, with a low around 27. West wind around 15 mph, with gusts as high as 38 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Friday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 36. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Friday Night
Mostly cloudy, with a low around 24.
Saturday
Partly sunny, with a high near 35.
Saturday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Sunday
A chance of snow showers before 1pm, then rain and snow showers likely. Cloudy, with a high near 41. Chance of precipitation is 60%.
Sunday Night
Rain and snow showers likely. Cloudy, with a low around 29. Chance of precipitation is 60%.
Monday
A chance of rain and snow showers. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 24. Chance of precipitation is 50%.
Tuesday
A chance of rain and snow showers. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Sinnamahoning PA
 41.36°N 78°W (Elev. 1598 ft)
Last Update:
1:05 am EST Nov 26, 2025
Forecast Valid:
1am EST Nov 26, 2025-6pm EST Dec 2, 2025
 
Forecast Discussion
 
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Additional Resources

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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