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

54°F

12°C

Humidity 94%
Wind Speed SW 7 mph
Barometer 29.79 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 26 Nov 5:15 am EST
Extended Forecast for

Saint Marys PA

Winter Weather Advisory November 27, 07:00am until November 29, 01:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Overnight

    Overnight: Showers likely. Cloudy, with a low around 42. Southwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely before 3pm. Mostly cloudy, with a high near 55. Southwest wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of snow showers, mainly before 10pm. Mostly cloudy, with a low around 25. Breezy, with a west wind 14 to 20 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.

    Low: 25 °F

    Chance Snow
    Showers and
    Breezy

  • Thanksgiving Day

    Thanksgiving Day: Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 32. Breezy, with a west wind 18 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 32 °F

    Snow Showers
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: Snow showers. Low around 22. West wind 15 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F

    Snow Showers

  • Friday

    Friday: Snow showers. High near 32. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 32 °F

    Snow Showers

  • Friday Night

    Friday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 50%.

    Low: 20 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly cloudy, with a high near 32.

    High: 32 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 50%.

    Low: 22 °F

    Mostly Cloudy
    then Chance
    Snow Showers

Detailed Forecast

Overnight
Showers likely. Cloudy, with a low around 42. Southwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers likely before 3pm. Mostly cloudy, with a high near 55. Southwest wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of snow showers, mainly before 10pm. Mostly cloudy, with a low around 25. Breezy, with a west wind 14 to 20 mph, with gusts as high as 41 mph. Chance of precipitation is 30%.
Thanksgiving Day
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 32. Breezy, with a west wind 18 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday Night
Snow showers. Low around 22. West wind 15 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Friday
Snow showers. High near 32. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Friday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 50%.
Saturday
Mostly cloudy, with a high near 32.
Saturday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 50%.
Sunday
Snow showers likely before 1pm, then rain and snow showers likely. Cloudy, with a high near 40. Chance of precipitation is 70%.
Sunday Night
Rain and snow showers likely. Cloudy, with a low around 25. Chance of precipitation is 70%.
Monday
A chance of rain and snow showers. Mostly cloudy, with a high near 35. Chance of precipitation is 50%.
Monday Night
Snow showers likely. Mostly cloudy, with a low around 20. Chance of precipitation is 60%.
Tuesday
Rain and snow showers likely. Mostly cloudy, with a high near 32. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys PA
 41.43°N 78.54°W (Elev. 1709 ft)
Last Update:
4:06 am EST Nov 26, 2025
Forecast Valid:
5am EST Nov 26, 2025-6pm EST Dec 2, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation