National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
News Headlines
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

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 27. Calm wind.

    High: 27 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 15. Light southeast wind.

    Low: 15 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow between 1pm and 3pm, then a chance of rain. Mostly cloudy, with a high near 40. Light and variable wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 40 °F

    Cloudy then
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain before 7pm, then a chance of rain and snow between 7pm and 10pm, then a chance of snow after 10pm. Cloudy, with a low around 26. West wind 10 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 26 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday

    Wednesday: A slight chance of snow. Mostly cloudy, with a high near 31. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 31 °F

    Slight Chance
    Snow

  • Wednesday Night

    Wednesday Night: A slight chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.

    Low: 20 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 30.

    High: 30 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 27. Calm wind.
Tonight
Mostly cloudy, with a low around 15. Light southeast wind.
Tuesday
A slight chance of rain and snow between 1pm and 3pm, then a chance of rain. Mostly cloudy, with a high near 40. Light and variable wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A chance of rain before 7pm, then a chance of rain and snow between 7pm and 10pm, then a chance of snow after 10pm. Cloudy, with a low around 26. West wind 10 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A slight chance of snow. Mostly cloudy, with a high near 31. West wind around 15 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.
Thursday
Mostly cloudy, with a high near 27.
Thursday Night
Mostly cloudy, with a low around 14.
Friday
Mostly sunny, with a high near 30.
Friday Night
Partly cloudy, with a low around 16.
Saturday
Mostly sunny, with a high near 37.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Snow likely. Mostly cloudy, with a high near 34. Chance of precipitation is 60%.
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:
1:05 pm EST Feb 9, 2026
Forecast Valid:
2pm EST Feb 9, 2026-6pm EST Feb 15, 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