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.

Partly Cloudy

46°F

8°C

Humidity 71%
Wind Speed SE 6 mph
Barometer 30.17 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 8 Jan 4:35 pm EST
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. Light southeast wind becoming south 5 to 10 mph in the evening. Winds could gust as high as 28 mph.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Rain, mainly before 3pm. High near 51. South wind 8 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain

  • Friday Night

    Friday Night: A slight chance of rain before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 34. West wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Rain, mainly after 1pm. High near 41. Light and variable wind becoming east around 5 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 41 °F

    Chance Rain
    then Rain

  • Saturday Night

    Saturday Night: Rain showers likely before 4am, then a slight chance of snow showers. Mostly cloudy, with a low around 31. Southeast wind 5 to 9 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 31 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Sunday

    Sunday: A chance of snow showers, mainly after 7am. Partly sunny, with a high near 35. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 36. Light southeast wind becoming south 5 to 10 mph in the evening. Winds could gust as high as 28 mph.
Friday
Rain, mainly before 3pm. High near 51. South wind 8 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A slight chance of rain before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 34. West wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Saturday
Rain, mainly after 1pm. High near 41. Light and variable wind becoming east around 5 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain showers likely before 4am, then a slight chance of snow showers. Mostly cloudy, with a low around 31. Southeast wind 5 to 9 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Sunday
A chance of snow showers, mainly after 7am. Partly sunny, with a high near 35. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Partly sunny, with a high near 35.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 40.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A chance of rain and snow showers. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.
Wednesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 23. Chance of precipitation is 50%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 29. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
Last Update:
1:05 pm EST Jan 8, 2026
Forecast Valid:
4pm EST Jan 8, 2026-6pm EST Jan 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