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

41°F

5°C

Humidity 87%
Wind Speed SW 3 mph
Barometer 29.76 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 10 Nov 12:35 am EST
Extended Forecast for

4 Miles SE Sinnamahoning PA

  • Overnight

    Overnight: Rain showers likely before 3am, then a chance of rain and snow showers between 3am and 4am, then a chance of snow showers after 4am. Cloudy, with a low around 28. Northwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 28 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A chance of snow showers, mainly before 1pm. Mostly cloudy, with a high near 36. Northwest wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Chance Snow
    Showers then
    Slight Chance
    Snow Showers

  • Monday Night

    Monday Night: A slight chance of snow showers before 1am, then snow showers likely after 2am. Mostly cloudy, with a low around 24. West wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Slight Chance
    Snow Showers
    then Snow
    Showers
    Likely

  • Veterans Day

    Veterans Day: Snow showers likely, mainly between 7am and 1pm. Mostly cloudy, with a high near 37. West wind 11 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 37 °F

    Snow Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of snow showers. Mostly cloudy, with a low around 28. Southwest wind around 11 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: A chance of rain and snow showers before 1pm, then a chance of rain showers. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.

    High: 42 °F

    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A chance of rain and snow showers before 1am, then a chance of snow showers. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.

    Low: 34 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Rain showers likely before 3am, then a chance of rain and snow showers between 3am and 4am, then a chance of snow showers after 4am. Cloudy, with a low around 28. Northwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
A chance of snow showers, mainly before 1pm. Mostly cloudy, with a high near 36. Northwest wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Monday Night
A slight chance of snow showers before 1am, then snow showers likely after 2am. Mostly cloudy, with a low around 24. West wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Veterans Day
Snow showers likely, mainly between 7am and 1pm. Mostly cloudy, with a high near 37. West wind 11 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 28. Southwest wind around 11 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Wednesday
A chance of rain and snow showers before 1pm, then a chance of rain showers. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Wednesday Night
A chance of rain and snow showers before 1am, then a chance of snow showers. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.
Thursday
Partly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 47.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Partly sunny, with a high near 46.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 51. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
11:46 pm EST Nov 9, 2025
Forecast Valid:
12am EST Nov 10, 2025-6pm EST Nov 16, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation