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

43°F

6°C

Humidity 53%
Wind Speed S 12 G 17 mph
Barometer 29.61 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 13 Jan 6:35 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: A slight chance of rain before 8pm. Increasing clouds, with a low around 36. Southwest wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 36 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Rain and snow likely before 4pm, then snow. High near 39. Southwest wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 39 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 14. Wind chill values as low as zero. West wind 8 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 14 °F

    Snow Likely

  • Thursday

    Thursday: A slight chance of snow before 1pm. Partly sunny, with a high near 18. Wind chill values as low as zero. West wind 13 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 18 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 10. West wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 10 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow, mainly after 1pm. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.

    High: 26 °F

    Chance Snow

  • Friday Night

    Friday Night: A chance of snow before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.

    Low: 23 °F

    Chance Snow

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 32. Chance of precipitation is 50%.

    High: 32 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Tonight
A slight chance of rain before 8pm. Increasing clouds, with a low around 36. Southwest wind 10 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Wednesday
Rain and snow likely before 4pm, then snow. High near 39. Southwest wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 14. Wind chill values as low as zero. West wind 8 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
A slight chance of snow before 1pm. Partly sunny, with a high near 18. Wind chill values as low as zero. West wind 13 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 10. West wind 10 to 14 mph, with gusts as high as 25 mph.
Friday
A chance of snow, mainly after 1pm. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.
Friday Night
A chance of snow before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Saturday
A chance of snow. Mostly cloudy, with a high near 32. Chance of precipitation is 50%.
Saturday Night
A chance of snow before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Sunday
Mostly cloudy, with a high near 19.
Sunday Night
Mostly cloudy, with a low around 11.
M.L.King Day
A chance of snow. Mostly cloudy, with a high near 20. Chance of precipitation is 40%.
Monday Night
A chance of snow. Mostly cloudy, with a low around 8. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 15.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
1:41 pm EST Jan 13, 2026
Forecast Valid:
6pm EST Jan 13, 2026-6pm EST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation