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.

Partly Cloudy

19°F

-7°C

Humidity 63%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Last update 4 Feb 7:55 pm EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: Partly cloudy, with a low around 5. Northwest wind 3 to 5 mph.

    Low: 5 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 24. Wind chill values as low as zero. Light northwest wind.

    High: 24 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 9. Light southwest wind.

    Low: 9 °F

    Mostly Cloudy

  • Friday

    Friday: Snow, mainly after 1pm. High near 25. Southwest wind 5 to 7 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    High: 25 °F

    Chance Snow
    then Snow

  • Friday Night

    Friday Night: A chance of snow before 1am, then a slight chance of snow showers after 1am. Mostly cloudy, with a low around -2. Northwest wind 7 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.

    Low: -2 °F

    Chance Snow

  • Saturday

    Saturday: Partly sunny and cold, with a high near 8.

    High: 8 °F

    Cold

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around -5.

    Low: -5 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 16.

    High: 16 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 3.

    Low: 3 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 5. Northwest wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 24. Wind chill values as low as zero. Light northwest wind.
Thursday Night
Mostly cloudy, with a low around 9. Light southwest wind.
Friday
Snow, mainly after 1pm. High near 25. Southwest wind 5 to 7 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Friday Night
A chance of snow before 1am, then a slight chance of snow showers after 1am. Mostly cloudy, with a low around -2. Northwest wind 7 to 16 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than one inch possible.
Saturday
Partly sunny and cold, with a high near 8.
Saturday Night
Partly cloudy, with a low around -5.
Sunday
Mostly sunny, with a high near 16.
Sunday Night
Partly cloudy, with a low around 3.
Monday
Partly sunny, with a high near 28.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Mostly cloudy, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
A chance of rain. Mostly cloudy, with a high near 34. 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:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
7:06 pm EST Feb 4, 2026
Forecast Valid:
8pm EST Feb 4, 2026-6pm EST Feb 11, 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