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

27°F

-3°C

Humidity 74%
Wind Speed W 18 G 24 mph
Barometer 30.17 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 11 Jan 10:15 pm EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. West wind 13 to 15 mph, with gusts as high as 34 mph.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 34. West wind 11 to 13 mph, with gusts as high as 28 mph.

    High: 34 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27. West wind 8 to 10 mph, with gusts as high as 23 mph.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40. Southwest wind around 8 mph, with gusts as high as 21 mph.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain and snow showers before 10pm, then a chance of rain showers. Mostly cloudy, with a low around 35. Southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 35 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Wednesday

    Wednesday: Rain, possibly mixed with snow showers, mainly after 1pm. High near 40. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 40 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all snow after 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 70%.

    Low: 23 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: A chance of snow. Mostly cloudy, with a high near 26. Chance of precipitation is 50%.

    High: 26 °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
Mostly cloudy, with a low around 23. West wind 13 to 15 mph, with gusts as high as 34 mph.
Monday
Partly sunny, with a high near 34. West wind 11 to 13 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 27. West wind 8 to 10 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 40. Southwest wind around 8 mph, with gusts as high as 21 mph.
Tuesday Night
A chance of rain and snow showers before 10pm, then a chance of rain showers. Mostly cloudy, with a low around 35. Southwest wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday
Rain, possibly mixed with snow showers, mainly after 1pm. High near 40. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow likely, becoming all snow after 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 70%.
Thursday
A chance of snow. Mostly cloudy, with a high near 26. 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 29. 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. Mostly cloudy, with a high near 25. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
10:06 pm EST Jan 11, 2026
Forecast Valid:
10pm EST Jan 11, 2026-6pm EST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation