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

86°F

30°C

Humidity 49%
Wind Speed S 3 mph
Barometer 30.16 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 12 Aug 11:35 am EDT
Extended Forecast for

Saint Marys PA

  • Today

    Today: Sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms. High near 82. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 61. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 83 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 88. Calm wind becoming southwest around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around 64. Calm wind.
Wednesday
Showers and thunderstorms. High near 82. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 61. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers between 8am and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 88.
Saturday Night
Mostly clear, with a low around 62.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys PA
 41.44°N 78.57°W (Elev. 1795 ft)
Last Update:
7:04 am EDT Aug 12, 2025
Forecast Valid:
11am EDT Aug 12, 2025-6pm EDT Aug 18, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation