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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles S Kersey PA

  • Today

    Today: Showers and thunderstorms, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 67. South wind 9 to 15 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 67 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Rain showers before 4am, then a chance of rain and snow showers between 4am and 5am, then a chance of rain showers after 5am. Some thunder is also possible. Low around 29. West wind around 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 29 °F

    Severe
    Thunderstorms
    then Chance
    Rain/Snow

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 36. West wind 16 to 18 mph, with gusts as high as 36 mph.

    High: 36 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow before 11am, then a chance of rain and snow between 11am and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 45. Breezy, with a south wind 11 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 45 °F

    Chance
    Rain/Snow and
    Breezy

  • Friday Night

    Friday Night: A chance of rain and snow before 11pm, then a chance of snow between 11pm and 2am. Mostly cloudy, with a low around 25. Breezy. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 25 °F

    Breezy.
    Chance
    Rain/Snow
    then Chance
    Snow

  • Saturday

    Saturday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow showers. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.

    Low: 28 °F

    Chance Snow
    Showers

  • Sunday

    Sunday: A chance of snow showers before 2pm. Mostly cloudy, with a high near 52. Chance of precipitation is 40%.

    High: 52 °F

    Chance Snow
    Showers

Detailed Forecast

Today
Showers and thunderstorms, mainly before 4pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 67. South wind 9 to 15 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tonight
Rain showers before 4am, then a chance of rain and snow showers between 4am and 5am, then a chance of rain showers after 5am. Some thunder is also possible. Low around 29. West wind around 18 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 36. West wind 16 to 18 mph, with gusts as high as 36 mph.
Thursday Night
Partly cloudy, with a low around 27. West wind 6 to 10 mph, with gusts as high as 20 mph.
Friday
A chance of snow before 11am, then a chance of rain and snow between 11am and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 45. Breezy, with a south wind 11 to 21 mph, with gusts as high as 40 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Friday Night
A chance of rain and snow before 11pm, then a chance of snow between 11pm and 2am. Mostly cloudy, with a low around 25. Breezy. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 39.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Sunday
A chance of snow showers before 2pm. Mostly cloudy, with a high near 52. Chance of precipitation is 40%.
Sunday Night
Showers, mainly after 2am. Low around 33. Breezy. Chance of precipitation is 90%.
Monday
Rain and snow showers. High near 44. Breezy. Chance of precipitation is 80%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 17. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 26.
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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:
4:11 am EDT Mar 11, 2026
Forecast Valid:
4am EDT Mar 11, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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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