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

64°F

18°C

Humidity 94%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 63°F (17°C)
Visibility 3.00 mi
Last update 14 Jun 7:15 pm EDT
Extended Forecast for

Saint Marys PA

  • Tonight

    Tonight: A slight chance of showers after 8pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 59. Light east wind. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of showers before 11am, then a chance of showers after 2pm. Patchy fog before 1pm. Otherwise, cloudy, with a high near 69. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Chance
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: A chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 57. Light east wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 70. Southeast wind 5 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 76 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.

    High: 82 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers after 8pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 59. Light east wind. Chance of precipitation is 20%.
Sunday
A slight chance of showers before 11am, then a chance of showers after 2pm. Patchy fog before 1pm. Otherwise, cloudy, with a high near 69. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 57. Light east wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 70. Southeast wind 5 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Juneteenth
Showers likely, then showers and possibly a thunderstorm after 8am. High near 79. Chance of precipitation is 80%.
Thursday Night
Showers and thunderstorms. Low around 59. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 57.
Saturday
A chance of showers. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys PA
 41.43°N 78.54°W (Elev. 1709 ft)
Last Update:
5:17 pm EDT Jun 14, 2025
Forecast Valid:
7pm EDT Jun 14, 2025-6pm EDT Jun 21, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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