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

Grandview Park PA

  • Today

    Today: A slight chance of showers before 3pm, then a slight chance of showers after 4pm. Partly sunny, with a high near 66. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 66 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 56. Southwest wind 3 to 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. Some of the storms could be severe. High near 67. Southwest wind 8 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: 67 °F

    Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: Rain showers before 2am, then a chance of rain and snow showers. Low around 30. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 30 °F

    Showers then
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow showers before 8am. Partly sunny, with a high near 37. Northwest wind around 15 mph, with gusts as high as 33 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 37 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Thursday Night

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

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Rain and snow showers likely, mainly after 2pm. Mostly cloudy, with a high near 45. Chance of precipitation is 60%.

    High: 45 °F

    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain and snow showers likely, mainly before 8pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.

    Low: 25 °F

    Rain/Snow
    Likely then
    Chance
    Rain/Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers before 3pm, then a slight chance of showers after 4pm. Partly sunny, with a high near 66. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 56. Southwest wind 3 to 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. Some of the storms could be severe. High near 67. Southwest wind 8 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 2am, then a chance of rain and snow showers. Low around 30. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow showers before 8am. Partly sunny, with a high near 37. Northwest wind around 15 mph, with gusts as high as 33 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly clear, with a low around 24.
Friday
Rain and snow showers likely, mainly after 2pm. Mostly cloudy, with a high near 45. Chance of precipitation is 60%.
Friday Night
Rain and snow showers likely, mainly before 8pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Sunday
A chance of rain and snow showers. Mostly cloudy, with a high near 56. Chance of precipitation is 40%.
Sunday Night
Rain and snow showers. Low around 30. Chance of precipitation is 80%.
Monday
Rain and snow showers. High near 38. Chance of precipitation is 80%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grandview Park PA
 41.41°N 78.55°W (Elev. 1804 ft)
Last Update:
2:50 am EDT Mar 10, 2026
Forecast Valid:
4am EDT Mar 10, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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