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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

4 Miles NW Sinnamahoning PA

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 36. Northwest wind 14 to 16 mph, with gusts as high as 33 mph.

    High: 36 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 26. Northwest wind 6 to 11 mph, with gusts as high as 24 mph.

    Low: 26 °F

    Mostly Clear

  • Friday

    Friday: Snow showers likely before 2pm, then rain and snow showers likely between 2pm and 5pm, then rain showers likely after 5pm. Mostly cloudy, with a high near 45. South wind 9 to 16 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 45 °F

    Snow Showers
    Likely then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain and snow showers likely before 11pm, then a chance of snow showers between 11pm and 2am. Mostly cloudy, with a low around 28. West wind 15 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 28 °F

    Rain/Snow
    Likely then
    Chance Snow
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 41. West wind 10 to 14 mph, with gusts as high as 28 mph.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of snow showers, mainly after 2am. Mostly cloudy, with a low around 29. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: 29 °F

    Slight Chance
    Snow Showers
    then Chance
    Snow Showers

  • Sunday

    Sunday: A chance of snow showers before 2pm. Mostly cloudy, with a high near 50. Chance of precipitation is 30%.

    High: 50 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Cloudy, with a low around 42. Chance of precipitation is 60%.

    Low: 42 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Rain showers before 2pm, then rain and snow showers likely. High near 57. Chance of precipitation is 80%.

    High: 57 °F

    Showers then
    Rain/Snow

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 36. Northwest wind 14 to 16 mph, with gusts as high as 33 mph.
Tonight
Mostly clear, with a low around 26. Northwest wind 6 to 11 mph, with gusts as high as 24 mph.
Friday
Snow showers likely before 2pm, then rain and snow showers likely between 2pm and 5pm, then rain showers likely after 5pm. Mostly cloudy, with a high near 45. South wind 9 to 16 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Rain and snow showers likely before 11pm, then a chance of snow showers between 11pm and 2am. Mostly cloudy, with a low around 28. West wind 15 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday
Mostly sunny, with a high near 41. West wind 10 to 14 mph, with gusts as high as 28 mph.
Saturday Night
A chance of snow showers, mainly after 2am. Mostly cloudy, with a low around 29. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Sunday
A chance of snow showers before 2pm. Mostly cloudy, with a high near 50. Chance of precipitation is 30%.
Sunday Night
Showers likely, mainly after 2am. Cloudy, with a low around 42. Chance of precipitation is 60%.
Monday
Rain showers before 2pm, then rain and snow showers likely. High near 57. Chance of precipitation is 80%.
Monday Night
Rain and snow showers likely before 8pm. Mostly cloudy, with a low around 19. Chance of precipitation is 60%.
Tuesday
Mostly cloudy, with a high near 28.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Partly sunny, with a high near 34.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
3:06 am EDT Mar 12, 2026
Forecast Valid:
4am EDT Mar 12, 2026-6pm EDT Mar 18, 2026
 
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