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

30°F

-1°C

Humidity 69%
Wind Speed W 17 G 30 mph
Barometer 29.91 in
Dewpoint 21°F (-6°C)
Visibility 4.00 mi
Wind Chill18°F (-8°C)
Last update 11 Jan 2:55 pm EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • This Afternoon

    This Afternoon: Snow showers likely, mainly before 5pm. Mostly cloudy, with a high near 33. West wind around 14 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. Total daytime snow accumulation of less than one inch possible.

    High: 33 °F

    Snow Showers
    Likely

  • Tonight

    Tonight: A chance of snow showers, mainly before 8pm. Mostly cloudy, with a low around 25. West wind 10 to 15 mph, with gusts as high as 38 mph. Chance of precipitation is 30%.

    Low: 25 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 35. West wind 8 to 10 mph, with gusts as high as 26 mph.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27. West wind 6 to 8 mph, with gusts as high as 22 mph.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40. Southwest wind around 7 mph.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 1pm, then rain after 1pm. High near 40. Chance of precipitation is 80%.

    High: 40 °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 27. Chance of precipitation is 50%.

    High: 27 °F

    Chance Snow

Detailed Forecast

This Afternoon
Snow showers likely, mainly before 5pm. Mostly cloudy, with a high near 33. West wind around 14 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. Total daytime snow accumulation of less than one inch possible.
Tonight
A chance of snow showers, mainly before 8pm. Mostly cloudy, with a low around 25. West wind 10 to 15 mph, with gusts as high as 38 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 35. West wind 8 to 10 mph, with gusts as high as 26 mph.
Monday Night
Partly cloudy, with a low around 27. West wind 6 to 8 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 40. Southwest wind around 7 mph.
Tuesday Night
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 35. 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 40. Chance of precipitation is 80%.
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 27. 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 26.
Friday Night
Mostly cloudy, with a low around 17.
Saturday
A chance of snow showers. Partly sunny, with a high near 30. 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.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
Last Update:
1:41 pm EST Jan 11, 2026
Forecast Valid:
3pm EST Jan 11, 2026-6pm EST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation