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

61°F

16°C

Humidity 36%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 17 Oct 5:55 pm EDT
Extended Forecast for

Grandview Park PA

  • Tonight

    Tonight: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 43. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the morning.

    High: 71 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Partly cloudy, with a low around 49. Southeast wind around 6 mph. Chance of precipitation is 30%.

    Low: 49 °F

    Partly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 2pm. High near 71. South wind 9 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 71 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers. Low around 42. West wind 11 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 42 °F

    Showers

  • Monday

    Monday: A chance of showers before 2pm. Partly sunny, with a high near 57. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 57 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely, mainly after 2pm. Partly sunny, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Showers
    Likely

Detailed Forecast

Tonight
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 43. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the morning.
Saturday Night
A chance of showers after 2am. Partly cloudy, with a low around 49. Southeast wind around 6 mph. Chance of precipitation is 30%.
Sunday
Showers, mainly after 2pm. High near 71. South wind 9 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers. Low around 42. West wind 11 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A chance of showers before 2pm. Partly sunny, with a high near 57. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Showers likely, mainly after 2pm. Partly sunny, with a high near 58. Chance of precipitation is 60%.
Tuesday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Wednesday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 50. Chance of precipitation is 60%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 37. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 37. Chance of precipitation is 50%.
Friday
A chance of showers. Partly sunny, with a high near 53. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Grandview Park PA
 41.41°N 78.55°W (Elev. 1804 ft)
Last Update:
2:16 pm EDT Oct 17, 2025
Forecast Valid:
6pm EDT Oct 17, 2025-6pm EDT Oct 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation