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

41°F

5°C

Humidity 66%
Wind Speed SW 3 mph
Barometer 29.56 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 14 Jan 7:15 am EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Today

    Today: Rain, mainly after 1pm. High near 40. Southwest wind 5 to 7 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 40 °F

    Chance Rain
    then Rain

  • Tonight

    Tonight: Rain and snow, becoming all snow after 8pm. Low around 16. Light west wind becoming northwest 5 to 10 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 16 °F

    Rain/Snow
    then Snow
    Likely

  • Thursday

    Thursday: A chance of snow showers. Mostly cloudy, with a high near 21. West wind around 11 mph, with gusts as high as 32 mph. Chance of precipitation is 40%.

    High: 21 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 31 mph.

    Low: 13 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 28. West wind around 9 mph becoming south in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 40%.

    High: 28 °F

    Chance Snow
    Showers

  • Friday Night

    Friday Night: A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.

    Low: 24 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 60%.

    High: 34 °F

    Snow Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 12. Chance of precipitation is 30%.

    Low: 12 °F

    Chance Snow
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 21.

    High: 21 °F

    Partly Sunny

Detailed Forecast

Today
Rain, mainly after 1pm. High near 40. Southwest wind 5 to 7 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain and snow, becoming all snow after 8pm. Low around 16. Light west wind becoming northwest 5 to 10 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 21. West wind around 11 mph, with gusts as high as 32 mph. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 31 mph.
Friday
A chance of snow showers, mainly after 1pm. Mostly cloudy, with a high near 28. West wind around 9 mph becoming south in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 40%.
Friday Night
A chance of snow showers, mainly before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Saturday
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 34. Chance of precipitation is 60%.
Saturday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 12. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 21.
Sunday Night
Mostly cloudy, with a low around 11.
M.L.King Day
A chance of snow showers. Mostly cloudy, with a high near 21. Chance of precipitation is 40%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 9. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 16.
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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:
7:16 am EST Jan 14, 2026
Forecast Valid:
7am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation