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

32°F

0°C

Humidity 69%
Wind Speed SE 9 G 16 mph
Barometer 30.10 in
Dewpoint 23°F (-5°C)
Visibility 7.00 mi
Wind Chill24°F (-4°C)
Last update 30 Nov 4:55 am EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Overnight

    Overnight: A chance of snow showers. Cloudy, with a low around 27. South wind around 13 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 27 °F

    Chance Snow
    Showers

  • Sunday

    Sunday: Snow showers and sleet before 1pm, then a chance of rain and snow showers between 1pm and 4pm. High near 39. South wind 10 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow and sleet accumulation of less than one inch possible.

    High: 39 °F

    Snow/Sleet
    then Chance
    Wintry Mix

  • Sunday Night

    Sunday Night: A slight chance of snow showers between 3am and 4am. Mostly cloudy, with a low around 24. West wind around 10 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 33. Northwest wind 5 to 7 mph becoming calm in the afternoon. Winds could gust as high as 20 mph.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Snow likely after 1am. Mostly cloudy, with a low around 23. Calm wind becoming southeast 5 to 7 mph after midnight. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 23 °F

    Mostly Cloudy
    then Snow
    Likely

  • Tuesday

    Tuesday: Snow, mainly before 1pm. High near 35. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 35 °F

    Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of snow showers. Cloudy, with a low around 27. South wind around 13 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Sunday
Snow showers and sleet before 1pm, then a chance of rain and snow showers between 1pm and 4pm. High near 39. South wind 10 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow and sleet accumulation of less than one inch possible.
Sunday Night
A slight chance of snow showers between 3am and 4am. Mostly cloudy, with a low around 24. West wind around 10 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 33. Northwest wind 5 to 7 mph becoming calm in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Snow likely after 1am. Mostly cloudy, with a low around 23. Calm wind becoming southeast 5 to 7 mph after midnight. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Tuesday
Snow, mainly before 1pm. High near 35. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Mostly cloudy, with a low around 21.
Wednesday
Partly sunny, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 34. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 12.
Friday
A chance of snow. Partly sunny, with a high near 26. Chance of precipitation is 30%.
Friday Night
Snow likely. Mostly cloudy, with a low around 19. Chance of precipitation is 60%.
Saturday
A chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
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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:
4:01 am EST Nov 30, 2025
Forecast Valid:
5am EST Nov 30, 2025-6pm EST Dec 6, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation