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

32°F

0°C

Humidity 80%
Wind Speed W 8 mph
Barometer 29.99 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 7 Dec 12:55 pm EST
Extended Forecast for

Byrnedale PA

  • This Afternoon

    This Afternoon: A slight chance of snow showers. Mostly cloudy, with a high near 34. West wind around 8 mph. Chance of precipitation is 20%.

    High: 34 °F

    Slight Chance
    Snow Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 12. West wind around 6 mph becoming north after midnight.

    Low: 12 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 25. Northeast wind 3 to 6 mph.

    High: 25 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 8. Calm wind.

    Low: 8 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow after 1pm. Mostly cloudy, with a high near 34. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 40%.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after 1am. Cloudy, with a low around 28. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 28 °F

    Slight Chance
    Snow then
    Snow Likely

  • Wednesday

    Wednesday: Rain and snow. High near 40. Chance of precipitation is 100%.

    High: 40 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow before 1am, then snow showers likely after 1am. Low around 23. Chance of precipitation is 80%.

    Low: 23 °F

    Snow

  • Thursday

    Thursday: A chance of snow showers. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.

    High: 30 °F

    Chance Snow
    Showers

Detailed Forecast

This Afternoon
A slight chance of snow showers. Mostly cloudy, with a high near 34. West wind around 8 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 12. West wind around 6 mph becoming north after midnight.
Monday
Sunny, with a high near 25. Northeast wind 3 to 6 mph.
Monday Night
Partly cloudy, with a low around 8. Calm wind.
Tuesday
A chance of snow after 1pm. Mostly cloudy, with a high near 34. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 40%.
Tuesday Night
Snow likely, mainly after 1am. Cloudy, with a low around 28. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Wednesday
Rain and snow. High near 40. Chance of precipitation is 100%.
Wednesday Night
Snow before 1am, then snow showers likely after 1am. Low around 23. Chance of precipitation is 80%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.
Thursday Night
Snow showers likely. Mostly cloudy, with a low around 19. Chance of precipitation is 60%.
Friday
A chance of snow showers. Mostly cloudy, with a high near 28. Chance of precipitation is 50%.
Friday Night
Snow showers likely. Mostly cloudy, with a low around 13. Chance of precipitation is 70%.
Saturday
Snow showers likely. Mostly cloudy, with a high near 23. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Byrnedale PA
 41.32°N 78.48°W (Elev. 1506 ft)
Last Update:
12:56 pm EST Dec 7, 2025
Forecast Valid:
1pm EST Dec 7, 2025-6pm EST Dec 13, 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