National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

70°F

21°C

Humidity 94%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Jul 3:35 am EDT
Extended Forecast for

Saint Marys PASimilar City Names

  • Overnight

    Overnight: A slight chance of showers before 4am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    Showers

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after 11am. Cloudy, with a high near 81. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    Showers then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    T-storms
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly after 2pm. High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 66. Chance of precipitation is 80%.

    Low: 66 °F

    Showers then
    Chance
    T-storms

Detailed Forecast

Overnight
A slight chance of showers before 4am. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 20%.
Monday
A chance of showers and thunderstorms, mainly after 11am. Cloudy, with a high near 81. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 63. Calm wind.
Tuesday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 66. Calm wind.
Wednesday
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm, mainly after 2pm. High near 83. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 66. Chance of precipitation is 80%.
Friday
A chance of showers and thunderstorms between 8am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Friday Night
Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Saturday
A chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Saturday Night
A chance of showers. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys PASimilar City Names
 41.43°N 78.54°W (Elev. 1709 ft)
Last Update:
2:32 am EDT Jul 14, 2025
Forecast Valid:
3am EDT Jul 14, 2025-6pm EDT Jul 20, 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