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

  • Tonight

    Tonight: Increasing clouds, with a low around 47. Southwest wind 6 to 10 mph.

    Low: 47 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 65. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 65 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 56. South wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers and thunderstorms before 11am, then showers between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Some of the storms could be severe. High near 68. South wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers then
    Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: Rain showers before 5am, then a chance of rain and snow showers. Some thunder is also possible. Low around 30. West wind 15 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Severe
    Thunderstorms
    then
    Rain/Snow

  • Thursday

    Thursday: A chance of snow showers, mainly before 8am. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.

    High: 37 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Snow showers likely before 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.

    High: 43 °F

    Snow Showers
    Likely then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain likely, possibly mixed with snow showers, mainly before 8pm. Mostly cloudy, with a low around 26. Chance of precipitation is 60%.

    Low: 26 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 47. Southwest wind 6 to 10 mph.
Tuesday
Partly sunny, with a high near 65. Southwest wind 7 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
A chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 56. South wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms before 11am, then showers between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Some of the storms could be severe. High near 68. South wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain showers before 5am, then a chance of rain and snow showers. Some thunder is also possible. Low around 30. West wind 15 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow showers, mainly before 8am. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 24.
Friday
Snow showers likely before 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.
Friday Night
Rain likely, possibly mixed with snow showers, mainly before 8pm. Mostly cloudy, with a low around 26. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 39.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 30. Chance of precipitation is 50%.
Sunday
A chance of rain and snow showers. Mostly cloudy, with a high near 54. Chance of precipitation is 50%.
Sunday Night
Rain and snow showers. Low around 27. Chance of precipitation is 80%.
Monday
Rain and snow showers. High near 34. Chance of precipitation is 80%.
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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:
2:26 pm EDT Mar 9, 2026
Forecast Valid:
5pm EDT Mar 9, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation