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

39°F

4°C

Humidity 87%
Wind Speed SE 8 mph
Barometer 29.88 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 10 Jan 2:55 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

  • This Afternoon

    This Afternoon: Showers. High near 38. Southeast wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 38 °F

    Showers

  • Tonight

    Tonight: Showers, mainly before 11pm. Low around 27. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 27 °F

    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A chance of snow showers, mainly after 11am. Partly sunny, with a high near 31. West wind 11 to 18 mph, with gusts as high as 38 mph. Chance of precipitation is 40%.

    High: 31 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: A chance of snow showers, mainly before 8pm. Mostly cloudy, with a low around 24. Breezy, with a west wind 16 to 21 mph, with gusts as high as 39 mph. Chance of precipitation is 30%.

    Low: 24 °F

    Breezy.
    Chance Snow
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 33. West wind around 13 mph, with gusts as high as 28 mph.

    High: 33 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

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

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Rain and snow likely, mainly after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 60%.

    High: 39 °F

    Rain/Snow
    Likely

Detailed Forecast

This Afternoon
Showers. High near 38. Southeast wind around 8 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers, mainly before 11pm. Low around 27. South wind 9 to 13 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A chance of snow showers, mainly after 11am. Partly sunny, with a high near 31. West wind 11 to 18 mph, with gusts as high as 38 mph. Chance of precipitation is 40%.
Sunday Night
A chance of snow showers, mainly before 8pm. Mostly cloudy, with a low around 24. Breezy, with a west wind 16 to 21 mph, with gusts as high as 39 mph. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 33. West wind around 13 mph, with gusts as high as 28 mph.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Wednesday
Rain and snow likely, mainly after 1pm. Mostly cloudy, with a high near 39. Chance of precipitation is 60%.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 18. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 23.
Thursday Night
Mostly cloudy, with a low around 14.
Friday
A chance of snow showers. Partly sunny, with a high near 28. Chance of precipitation is 30%.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 30.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
1:06 pm EST Jan 10, 2026
Forecast Valid:
3pm EST Jan 10, 2026-6pm EST Jan 17, 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