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.

Mostly Cloudy

68°F

20°C

Humidity 73%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 15 Aug 12:15 am EDT
Extended Forecast for

7 Miles ENE Sinnamahoning PA

  • Overnight

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

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 88. Calm wind. Chance of precipitation is 30%.

    High: 88 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 89. Calm wind. Chance of precipitation is 30%.

    High: 89 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Patchy Fog

  • Sunday

    Sunday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.

    Low: 60 °F

    Showers
    Likely then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 64. Calm wind.
Friday
A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 88. Calm wind. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 4am. Otherwise, partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 89. Calm wind. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 8pm. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 30%.
Sunday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
A chance of showers after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.
Wednesday Night
A chance of thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 81.
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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:
4:24 pm EDT Aug 14, 2025
Forecast Valid:
12am EDT Aug 15, 2025-6pm EDT Aug 21, 2025
 
Forecast Discussion
 
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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