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

37°F

3°C

Humidity 93%
Wind Speed E 3 mph
Barometer 30.11 in
Dewpoint 36°F (2°C)
Visibility 1.25 mi
Last update 20 Nov 4:35 pm EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Tonight

    Tonight: Patchy fog after 10pm. Otherwise, cloudy, with a low around 37. Light and variable wind.

    Low: 37 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, cloudy, with a high near 51. Southwest wind 3 to 6 mph.

    High: 51 °F

    Patchy Fog
    then Cloudy

  • Friday Night

    Friday Night: A chance of rain. Cloudy, with a low around 36. Light and variable wind. Chance of precipitation is 40%.

    Low: 36 °F

    Chance Rain

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 45. North wind around 6 mph.

    High: 45 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 27. Light northwest wind.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 10pm. Otherwise, cloudy, with a low around 37. Light and variable wind.
Friday
Patchy fog before 8am. Otherwise, cloudy, with a high near 51. Southwest wind 3 to 6 mph.
Friday Night
A chance of rain. Cloudy, with a low around 36. Light and variable wind. Chance of precipitation is 40%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 45. North wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 27. Light northwest wind.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Partly cloudy, with a low around 33.
Monday
Mostly sunny, with a high near 49.
Monday Night
A chance of showers after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Tuesday
Showers, mainly after 1pm. High near 49. Chance of precipitation is 80%.
Tuesday Night
Showers likely. Cloudy, with a low around 43. Chance of precipitation is 70%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 54. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 31. Chance of precipitation is 40%.
Thanksgiving Day
A chance of showers. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
Last Update:
4:33 pm EST Nov 20, 2025
Forecast Valid:
4pm EST Nov 20, 2025-6pm EST Nov 27, 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