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

4 Miles SE Sinnamahoning PA

  • Tonight

    Tonight: Patchy fog. Otherwise, cloudy, with a low around 37. South wind around 5 mph becoming calm.

    Low: 37 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 9am. Otherwise, cloudy, with a high near 50. Southwest wind around 6 mph.

    High: 50 °F

    Patchy Fog
    then Cloudy

  • Friday Night

    Friday Night: A chance of rain. Cloudy, with a low around 36. Light and variable wind becoming northwest around 5 mph after midnight. Chance of precipitation is 40%.

    Low: 36 °F

    Chance Rain

  • Saturday

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

    High: 45 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 27. Northwest wind 3 to 5 mph.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 47.

    High: 47 °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. Otherwise, cloudy, with a low around 37. South wind around 5 mph becoming calm.
Friday
Patchy fog before 9am. Otherwise, cloudy, with a high near 50. Southwest wind around 6 mph.
Friday Night
A chance of rain. Cloudy, with a low around 36. Light and variable wind becoming northwest around 5 mph after midnight. Chance of precipitation is 40%.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 45. Northwest wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 27. Northwest wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 47.
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 48. 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
Mostly cloudy, with a high near 40.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
4:33 pm EST Nov 20, 2025
Forecast Valid:
4pm EST Nov 20, 2025-6pm EST Nov 27, 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