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

36°F

2°C

Humidity 87%
Wind Speed W 8 mph
Barometer 29.87 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 11 Jan 1:35 am EST
Extended Forecast for

Byrnedale PA

  • Overnight

    Overnight: A slight chance of rain before 2am. Mostly cloudy, with a low around 27. West wind 9 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: Snow showers. The snow could be heavy at times. Areas of blowing snow after 3pm. High near 33. West wind 7 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 33 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Sunday Night

    Sunday Night: Snow showers likely, mainly before 9pm. Areas of blowing snow between 8pm and 9pm. Mostly cloudy, with a low around 24. West wind 11 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 24 °F

    Snow Showers
    Likely and
    Areas Blowing
    Snow

  • Monday

    Monday: Mostly sunny, with a high near 35. Southwest wind 9 to 11 mph, with gusts as high as 24 mph.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27. West wind around 7 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.

    Low: 35 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Showers. High near 40. Chance of precipitation is 80%.

    High: 40 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain and snow showers likely before 1am, then a chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 60%.

    Low: 19 °F

    Rain/Snow
    Likely

Detailed Forecast

Overnight
A slight chance of rain before 2am. Mostly cloudy, with a low around 27. West wind 9 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Sunday
Snow showers. The snow could be heavy at times. Areas of blowing snow after 3pm. High near 33. West wind 7 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
Snow showers likely, mainly before 9pm. Areas of blowing snow between 8pm and 9pm. Mostly cloudy, with a low around 24. West wind 11 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday
Mostly sunny, with a high near 35. Southwest wind 9 to 11 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 27. West wind around 7 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.
Wednesday
Showers. High near 40. Chance of precipitation is 80%.
Wednesday Night
Rain and snow showers likely before 1am, then a chance of snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 60%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 25. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 14.
Friday
A chance of snow showers. Partly sunny, with a high near 28. Chance of precipitation is 30%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Saturday
A chance of snow showers. Partly sunny, with a high near 31. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Byrnedale PA
 41.29°N 78.48°W (Elev. 1447 ft)
Last Update:
1:06 am EST Jan 11, 2026
Forecast Valid:
1am EST Jan 11, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation