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 100%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 61°F (16°C)
Visibility 4.00 mi
Last update 15 Jun 1:15 am EDT
Extended Forecast for

7 Miles ENE Sinnamahoning PA

  • Overnight

    Overnight: Scattered showers. Patchy fog. Otherwise, cloudy, with a low around 59. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 59 °F

    Scattered
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Scattered showers, mainly between 2pm and 5pm. Patchy fog before 11am. Otherwise, cloudy, with a high near 69. Light east wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Scattered
    Showers and
    Patchy Fog

  • Sunday Night

    Sunday Night: Isolated showers. Patchy fog between 10pm and 11pm. Otherwise, mostly cloudy, with a low around 60. Calm wind. Chance of precipitation is 20%.

    Low: 60 °F

    Isolated
    Showers and
    Patchy Fog

  • Monday

    Monday: A slight chance of showers. Mostly cloudy, with a high near 72. Light southeast wind. Chance of precipitation is 20%.

    High: 72 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 5am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms, then showers likely after 8am. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Slight Chance
    T-storms 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 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers likely after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

Detailed Forecast

Overnight
Scattered showers. Patchy fog. Otherwise, cloudy, with a low around 59. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Scattered showers, mainly between 2pm and 5pm. Patchy fog before 11am. Otherwise, cloudy, with a high near 69. Light east wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Isolated showers. Patchy fog between 10pm and 11pm. Otherwise, mostly cloudy, with a low around 60. Calm wind. Chance of precipitation is 20%.
Monday
A slight chance of showers. Mostly cloudy, with a high near 72. Light southeast wind. Chance of precipitation is 20%.
Monday Night
A slight chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 5am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.
Tuesday
A slight chance of showers and thunderstorms, then showers likely after 8am. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
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 66. Chance of precipitation is 60%.
Wednesday
Showers likely after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Juneteenth
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 83. Chance of precipitation is 80%.
Thursday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles ENE Sinnamahoning PA
 41.4°N 77.93°W (Elev. 1047 ft)
Last Update:
1:25 am EDT Jun 15, 2025
Forecast Valid:
1am EDT Jun 15, 2025-6pm EDT Jun 21, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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