National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

27°F

-3°C

Humidity 80%
Wind Speed W 12 G 26 mph
Barometer 30.10 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 11 Jan 7:55 pm EST
Extended Forecast for

3 Miles NNE Sinnamahoning PA

  • Tonight

    Tonight: A slight chance of snow showers before 9pm. Mostly cloudy, with a low around 25. West wind 8 to 13 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, with a high near 36. West wind 6 to 10 mph, with gusts as high as 25 mph.

    High: 36 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 28. West wind around 6 mph, with gusts as high as 21 mph.

    Low: 28 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 42. Southwest wind 3 to 6 mph.

    High: 42 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 36. Southwest wind around 6 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 1pm, then rain after 1pm. High near 41. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 41 °F

    Chance
    Showers then
    Rain

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all snow after 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 70%.

    Low: 24 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 50%.

    High: 28 °F

    Chance Snow

  • Thursday Night

    Thursday Night: A chance of snow before 1am. Mostly cloudy, with a low around 14. Chance of precipitation is 30%.

    Low: 14 °F

    Chance Snow

Detailed Forecast

Tonight
A slight chance of snow showers before 9pm. Mostly cloudy, with a low around 25. West wind 8 to 13 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 36. West wind 6 to 10 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 28. West wind around 6 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 42. Southwest wind 3 to 6 mph.
Tuesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 36. Southwest wind around 6 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers before 1pm, then rain after 1pm. High near 41. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain and snow likely, becoming all snow after 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 70%.
Thursday
A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 50%.
Thursday Night
A chance of snow before 1am. Mostly cloudy, with a low around 14. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
A chance of snow showers. Partly sunny, with a high near 31. Chance of precipitation is 40%.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 40%.
Sunday
A chance of snow showers. Partly sunny, with a high near 27. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Sinnamahoning PA
 41.43°N 78.02°W (Elev. 1565 ft)
Last Update:
7:05 pm EST Jan 11, 2026
Forecast Valid:
8pm EST Jan 11, 2026-6pm EST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation