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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Saint Marys PA

Winter Storm Watch January 24, 10:00pm until January 26, 01:00pm
Cold Weather Advisory January 23, 01:00pm until January 24, 10:00am
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • Today

    Today: Partly sunny, with a temperature falling to around 4 by 5pm. Wind chill values as low as -15. West wind 14 to 16 mph, with gusts as high as 29 mph.

    High: 14 °F⇓

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around -5. Wind chill values as low as -15. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.

    Low: -5 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 10. Wind chill values as low as -10. Light and variable wind.

    High: 10 °F

    Cold

  • Saturday Night

    Saturday Night: Snow, mainly after 1am. Low around 5. Wind chill values as low as -5. Calm wind becoming east 5 to 7 mph after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 5 °F

    Slight Chance
    Snow then
    Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 15. East wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.

    High: 15 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. The snow could be heavy at times. Low around 11. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    Low: 11 °F

    Heavy Snow

  • Monday

    Monday: Snow likely before 1pm, then a chance of snow showers after 1pm. Mostly cloudy, with a high near 16. Chance of precipitation is 60%.

    High: 16 °F

    Snow Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 12.

    High: 12 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a temperature falling to around 4 by 5pm. Wind chill values as low as -15. West wind 14 to 16 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around -5. Wind chill values as low as -15. Northwest wind 5 to 10 mph, with gusts as high as 22 mph.
Saturday
Partly sunny and cold, with a high near 10. Wind chill values as low as -10. Light and variable wind.
Saturday Night
Snow, mainly after 1am. Low around 5. Wind chill values as low as -5. Calm wind becoming east 5 to 7 mph after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Sunday
Snow. The snow could be heavy at times. High near 15. East wind 8 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New snow accumulation of 5 to 9 inches possible.
Sunday Night
Snow. The snow could be heavy at times. Low around 11. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Monday
Snow likely before 1pm, then a chance of snow showers after 1pm. Mostly cloudy, with a high near 16. Chance of precipitation is 60%.
Monday Night
Mostly cloudy, with a low around -2.
Tuesday
Partly sunny, with a high near 12.
Tuesday Night
Mostly cloudy, with a low around 2.
Wednesday
Mostly cloudy, with a high near 16.
Wednesday Night
Mostly cloudy, with a low around -1.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 13. 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:
Saint Marys PA
 41.44°N 78.57°W (Elev. 1795 ft)
Last Update:
2:51 am EST Jan 23, 2026
Forecast Valid:
4am EST Jan 23, 2026-6pm EST Jan 29, 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