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.

Partly Cloudy

45°F

7°C

Humidity 61%
Wind Speed Calm
Barometer 30.22 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 24 Nov 3:35 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. Calm wind becoming south 5 to 7 mph in the evening.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Periods of rain, mainly after 11am. High near 47. Southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain Likely
    then Rain

  • Tuesday Night

    Tuesday Night: Showers. Low around 43. South wind around 8 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Showers

  • Wednesday

    Wednesday: Showers. High near 56. Southwest wind 7 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of snow showers. Mostly cloudy, with a low around 27. West wind around 15 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Snow Showers

  • Thanksgiving Day

    Thanksgiving Day: A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 31. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 31 °F

    Slight Chance
    Snow Showers
    then Chance
    Snow Showers

  • Thursday Night

    Thursday Night: Snow showers likely. Mostly cloudy, with a low around 26. Chance of precipitation is 70%.

    Low: 26 °F

    Snow Showers
    Likely

  • Friday

    Friday: Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 31. Chance of precipitation is 60%.

    High: 31 °F

    Snow Showers
    Likely

  • Friday Night

    Friday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.

    Low: 24 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 38. Calm wind becoming south 5 to 7 mph in the evening.
Tuesday
Periods of rain, mainly after 11am. High near 47. Southeast wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Showers. Low around 43. South wind around 8 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Showers. High near 56. Southwest wind 7 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A slight chance of snow showers. Mostly cloudy, with a low around 27. West wind around 15 mph, with gusts as high as 36 mph. Chance of precipitation is 20%.
Thanksgiving Day
A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 31. 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 26. Chance of precipitation is 70%.
Friday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 31. Chance of precipitation is 60%.
Friday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 32.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.
Sunday Night
Rain likely. Cloudy, with a low around 30. Chance of precipitation is 60%.
Monday
Rain likely. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.
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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:
3:36 pm EST Nov 24, 2025
Forecast Valid:
3pm EST Nov 24, 2025-6pm EST Dec 1, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation