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

43°F

6°C

Humidity 87%
Wind Speed Calm
Barometer 30.28 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 2 Nov 8:55 am EST
Extended Forecast for

2 Miles SSW Sinnamahoning PA

  • Today

    Today: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 63. Light southwest wind.

    High: 63 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Light south wind.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 63. Southwest wind 5 to 10 mph, with gusts as high as 24 mph.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. West wind around 8 mph, with gusts as high as 24 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61. West wind 6 to 9 mph, with gusts as high as 21 mph.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers after 1pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.

    High: 63 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 63. Light southwest wind.
Tonight
Partly cloudy, with a low around 40. Light south wind.
Monday
Mostly sunny, with a high near 63. Southwest wind 5 to 10 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 39. West wind around 8 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 61. West wind 6 to 9 mph, with gusts as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
A chance of showers after 1pm. Mostly cloudy, with a high near 63. Chance of precipitation is 30%.
Wednesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Mostly cloudy, with a low around 35.
Friday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 40%.
Friday Night
Showers likely. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
Saturday
A chance of showers. Mostly cloudy, with a high near 59. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Sinnamahoning PA
 41.34°N 78.06°W (Elev. 899 ft)
Last Update:
7:16 am EST Nov 2, 2025
Forecast Valid:
9am EST Nov 2, 2025-6pm EST Nov 8, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation