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.

Mostly Cloudy

30°F

-1°C

Humidity 69%
Wind Speed SW 7 mph
Barometer 29.99 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 13 Jan 7:35 am EST
Extended Forecast for

3 Miles NNE Sinnamahoning PA

  • Today

    Today: Mostly cloudy, with a high near 43. Southwest wind 6 to 8 mph.

    High: 43 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of rain before 10pm. Mostly cloudy, with a low around 37. Southwest wind around 7 mph. Chance of precipitation is 20%.

    Low: 37 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow before 10am, then rain between 10am and 4pm, then rain and snow after 4pm. High near 42. Southwest wind around 7 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 42 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow, possibly mixed with rain, becoming all snow after 10pm. Low around 16. West wind 5 to 10 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Rain/Snow
    then Snow
    Likely

  • Thursday

    Thursday: A chance of snow showers, mainly before 1pm. Partly sunny, with a high near 21. West wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.

    High: 21 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 12.

    Low: 12 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow showers after 1pm. Partly sunny, with a high near 29. Chance of precipitation is 30%.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow Showers

  • Friday Night

    Friday Night: A chance of snow showers. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.

    Low: 22 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: A chance of snow showers. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.

    High: 34 °F

    Chance Snow
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 43. Southwest wind 6 to 8 mph.
Tonight
A slight chance of rain before 10pm. Mostly cloudy, with a low around 37. Southwest wind around 7 mph. Chance of precipitation is 20%.
Wednesday
A chance of rain and snow before 10am, then rain between 10am and 4pm, then rain and snow after 4pm. High near 42. Southwest wind around 7 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Snow, possibly mixed with rain, becoming all snow after 10pm. Low around 16. West wind 5 to 10 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow showers, mainly before 1pm. Partly sunny, with a high near 21. West wind around 11 mph, with gusts as high as 29 mph. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
A chance of snow showers after 1pm. Partly sunny, with a high near 29. Chance of precipitation is 30%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 22. Chance of precipitation is 30%.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
Saturday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 30%.
Sunday
A chance of snow showers. Partly sunny, with a high near 25. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 12.
M.L.King Day
A chance of snow showers. Mostly cloudy, with a high near 23. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Sinnamahoning PA
 41.43°N 78.02°W (Elev. 1565 ft)
Last Update:
7:06 am EST Jan 13, 2026
Forecast Valid:
7am EST Jan 13, 2026-6pm EST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation