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

  • Overnight

    Overnight: A slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 48. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 48 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. High near 69. Southwest wind 8 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Severe
    Thunderstorms

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Some of the storms could be severe. Low around 45. Southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 45 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 54. West wind 11 to 14 mph, with gusts as high as 24 mph.

    High: 54 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40. Southwest wind around 9 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers after 1pm. Mostly sunny, with a high near 66. Chance of precipitation is 40%.

    High: 66 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers, mainly after 1am. Low around 54. Chance of precipitation is 80%.

    Low: 54 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 48. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. Some of the storms could be severe. High near 69. Southwest wind 8 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Some of the storms could be severe. Low around 45. Southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 54. West wind 11 to 14 mph, with gusts as high as 24 mph.
Sunday Night
Clear, with a low around 40. Southwest wind around 9 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 46.
Tuesday
A chance of showers after 1pm. Mostly sunny, with a high near 66. Chance of precipitation is 40%.
Tuesday Night
Showers, mainly after 1am. Low around 54. Chance of precipitation is 80%.
Wednesday
Showers. High near 61. Chance of precipitation is 90%.
Wednesday Night
Rain and snow showers likely. Cloudy, with a low around 30. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 41.
Thursday Night
Mostly clear, with a low around 27.
Friday
A chance of rain and snow showers. Partly sunny, with a high near 46. Chance of precipitation is 30%.
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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:
11:10 pm EST Mar 6, 2026
Forecast Valid:
12am EST Mar 7, 2026-6pm EDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation