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

19°F

-7°C

Humidity 73%
Wind Speed W 6 mph
Barometer 30.02 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 18 Jan 8:35 am EST
Extended Forecast for

3 Miles S Kersey PA

  • Today

    Today: Partly sunny, with a high near 20. West wind 6 to 9 mph.

    High: 20 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of snow after 4am. Mostly cloudy, with a low around 14. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.

    Low: 14 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • M.L.King Day

    M.L.King Day: Snow likely, mainly after 10am. Mostly cloudy, with a high near 21. Wind chill values as low as zero. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 21 °F

    Snow Likely
    and Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 1. Wind chill values as low as -15. West wind 16 to 18 mph, with gusts as high as 33 mph.

    Low: 1 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny and cold, with a high near 10. West wind around 15 mph, with gusts as high as 30 mph.

    High: 10 °F

    Cold

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 3.

    Low: 3 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of snow. Mostly cloudy, with a high near 30. Chance of precipitation is 40%.

    High: 30 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A chance of snow. Mostly cloudy, with a low around 17. Chance of precipitation is 50%.

    Low: 17 °F

    Chance Snow

  • Thursday

    Thursday: A chance of snow. Partly sunny, with a high near 22. Chance of precipitation is 40%.

    High: 22 °F

    Chance Snow

Detailed Forecast

Today
Partly sunny, with a high near 20. West wind 6 to 9 mph.
Tonight
A slight chance of snow after 4am. Mostly cloudy, with a low around 14. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.
M.L.King Day
Snow likely, mainly after 10am. Mostly cloudy, with a high near 21. Wind chill values as low as zero. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
Mostly cloudy, with a low around 1. Wind chill values as low as -15. West wind 16 to 18 mph, with gusts as high as 33 mph.
Tuesday
Partly sunny and cold, with a high near 10. West wind around 15 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 3.
Wednesday
A chance of snow. Mostly cloudy, with a high near 30. Chance of precipitation is 40%.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 17. Chance of precipitation is 50%.
Thursday
A chance of snow. Partly sunny, with a high near 22. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 7.
Friday
Partly sunny, with a high near 25.
Friday Night
A chance of snow. Mostly cloudy, with a low around 18. Chance of precipitation is 40%.
Saturday
A chance of snow. Mostly cloudy, with a high near 25. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Kersey PA
 41.29°N 78.63°W (Elev. 1896 ft)
Last Update:
8:01 am EST Jan 18, 2026
Forecast Valid:
8am EST Jan 18, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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