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

41°F

5°C

Humidity 87%
Wind Speed SE 6 mph
Barometer 29.85 in
Dewpoint 37°F (3°C)
Visibility 5.00 mi
Wind Chill37°F (3°C)
Last update 10 Jan 3:55 pm EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • This Afternoon

    This Afternoon: Showers. High near 40. Southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 40 °F

    Showers

  • Tonight

    Tonight: Showers, mainly before 11pm. Low around 28. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 28 °F

    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A chance of snow showers, mainly after 11am. Increasing clouds, with a high near 33. West wind 9 to 15 mph, with gusts as high as 37 mph. Chance of precipitation is 40%.

    High: 33 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: A chance of snow showers, mainly before 8pm. Mostly cloudy, with a low around 25. West wind 13 to 17 mph, with gusts as high as 40 mph. Chance of precipitation is 30%.

    Low: 25 °F

    Chance Snow
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35. West wind around 11 mph, with gusts as high as 26 mph.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: A chance of rain before 1pm, then rain and snow likely. Mostly cloudy, with a high near 40. Chance of precipitation is 60%.

    High: 40 °F

    Chance Rain
    then
    Rain/Snow
    Likely

Detailed Forecast

This Afternoon
Showers. High near 40. Southeast wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers, mainly before 11pm. Low around 28. South wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A chance of snow showers, mainly after 11am. Increasing clouds, with a high near 33. West wind 9 to 15 mph, with gusts as high as 37 mph. Chance of precipitation is 40%.
Sunday Night
A chance of snow showers, mainly before 8pm. Mostly cloudy, with a low around 25. West wind 13 to 17 mph, with gusts as high as 40 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 35. West wind around 11 mph, with gusts as high as 26 mph.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Wednesday
A chance of rain before 1pm, then rain and snow likely. Mostly cloudy, with a high near 40. Chance of precipitation is 60%.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 19. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 25.
Thursday Night
Mostly cloudy, with a low around 15.
Friday
A chance of snow showers. 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 31.
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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:
1:06 pm EST Jan 10, 2026
Forecast Valid:
4pm EST Jan 10, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation