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

36°F

2°C

Humidity 93%
Wind Speed SW 10 mph
Barometer 29.34 in
Dewpoint 34°F (1°C)
Visibility 1.25 mi
Wind Chill29°F (-2°C)
Last update 10 Dec 12:15 pm EST
Extended Forecast for

4 Miles SE Sinnamahoning PA

Winter Weather Advisory December 10, 12:30pm until December 10, 10:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory December 10, 12:30pm until December 10, 10:00pm

    NOW until 10:00pm Wed

    Winter Weather Advisory

  • This Afternoon

    High: 35 °F

    Rain/Snow

  • Tonight

    Tonight: Rain and snow likely before 8pm, then a chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 20. Northwest wind 11 to 13 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Rain/Snow
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of snow showers, mainly after 7am. Mostly cloudy, with a high near 26. West wind 11 to 13 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    High: 26 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 20. West wind 9 to 13 mph, with gusts as high as 31 mph. Chance of precipitation is 40%.

    Low: 20 °F

    Chance Snow
    Showers

  • Friday

    Friday: Mostly cloudy, with a high near 29. West wind 5 to 7 mph.

    High: 29 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A chance of snow, mainly after 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 40%.

    Low: 16 °F

    Chance Snow

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 50%.

    High: 29 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 13. Chance of precipitation is 50%.

    Low: 13 °F

    Chance Snow

Detailed Forecast

This Afternoon
Snow before 3pm, then a chance of rain and snow. High near 35. Southwest wind around 9 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Rain and snow likely before 8pm, then a chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 20. Northwest wind 11 to 13 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow showers, mainly after 7am. Mostly cloudy, with a high near 26. West wind 11 to 13 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Thursday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 20. West wind 9 to 13 mph, with gusts as high as 31 mph. Chance of precipitation is 40%.
Friday
Mostly cloudy, with a high near 29. West wind 5 to 7 mph.
Friday Night
A chance of snow, mainly after 1am. Mostly cloudy, with a low around 16. Chance of precipitation is 40%.
Saturday
A chance of snow. Mostly cloudy, with a high near 29. Chance of precipitation is 50%.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 13. Chance of precipitation is 50%.
Sunday
A chance of snow. Mostly cloudy, with a high near 21. Chance of precipitation is 40%.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Mostly cloudy, with a high near 23.
Monday Night
Mostly cloudy, with a low around 14.
Tuesday
Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
12:25 pm EST Dec 10, 2025
Forecast Valid:
12pm EST Dec 10, 2025-6pm EST Dec 16, 2025
 
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