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

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Mostly Cloudy and Breezy

32°F

0°C

Humidity 47%
Wind Speed W 22 G 30 mph
Barometer 29.99 in
Dewpoint 14°F (-10°C)
Visibility 7.00 mi
Wind Chill19°F (-7°C)
Last update 22 Jan 11:15 am EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

Winter Storm Watch January 24, 10:00pm until January 26, 01:00pm
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Mostly sunny, with a high near 31. West wind 15 to 17 mph, with gusts as high as 39 mph.

    High: 31 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 14. West wind around 11 mph, with gusts as high as 25 mph.

    Low: 14 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a temperature rising to near 17 by 10am, then falling to around 7 during the remainder of the day. Wind chill values as low as -10. West wind around 14 mph, with gusts as high as 31 mph.

    High: 17 °F⇓

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 0. Wind chill values as low as -15. Northwest wind 7 to 11 mph, with gusts as high as 25 mph.

    Low: 0 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 12. Northwest wind 3 to 6 mph.

    High: 12 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 6. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 6 °F

    Chance Snow
    then Snow
    Likely

  • Sunday

    Sunday: Snow. High near 15. Chance of precipitation is 90%.

    High: 15 °F

    Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly before 1am. Mostly cloudy, with a low around 9. Chance of precipitation is 70%.

    Low: 9 °F

    Snow Likely

  • Monday

    Monday: A chance of snow showers before 1pm. Mostly cloudy, with a high near 17. Chance of precipitation is 30%.

    High: 17 °F

    Chance Snow
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 31. West wind 15 to 17 mph, with gusts as high as 39 mph.
Tonight
Partly cloudy, with a low around 14. West wind around 11 mph, with gusts as high as 25 mph.
Friday
Partly sunny, with a temperature rising to near 17 by 10am, then falling to around 7 during the remainder of the day. Wind chill values as low as -10. West wind around 14 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, with a low around 0. Wind chill values as low as -15. Northwest wind 7 to 11 mph, with gusts as high as 25 mph.
Saturday
Partly sunny, with a high near 12. Northwest wind 3 to 6 mph.
Saturday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 6. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Sunday
Snow. High near 15. Chance of precipitation is 90%.
Sunday Night
Snow likely, mainly before 1am. Mostly cloudy, with a low around 9. Chance of precipitation is 70%.
Monday
A chance of snow showers before 1pm. Mostly cloudy, with a high near 17. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 3.
Tuesday
Partly sunny, with a high near 18.
Tuesday Night
Mostly cloudy, with a low around 6.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 22. 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:
11:16 am EST Jan 22, 2026
Forecast Valid:
11am EST Jan 22, 2026-6pm EST Jan 28, 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