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.

Overcast

10°F

-12°C

Humidity 67%
Wind Speed W 7 mph
Barometer 29.95 in
Dewpoint 1°F (-17°C)
Visibility 4.00 mi
Wind Chill-1°F (-18°C)
Last update 28 Jan 4:55 pm EST
Extended Forecast for

6 Miles ESE Sinnamahoning PA

Cold Weather Advisory January 29, 01:00am until January 29, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: A slight chance of snow. Mostly cloudy, with a high near 11. Wind chill values as low as -5. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 11 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around 0. Wind chill values as low as -15. West wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 0 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of flurries before 1pm, then a slight chance of snow between 1pm and 2pm, then a chance of flurries after 2pm. Partly sunny, with a high near 14. Wind chill values as low as -15. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 14 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -5. Wind chill values as low as -20. Northwest wind 7 to 9 mph.

    Low: -5 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 12. Northwest wind 6 to 8 mph.

    High: 12 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around -6.

    Low: -6 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 14.

    High: 14 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 2.

    Low: 2 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of snow. Mostly cloudy, with a high near 11. Wind chill values as low as -5. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 0. Wind chill values as low as -15. West wind 9 to 11 mph, with gusts as high as 21 mph.
Thursday
A chance of flurries before 1pm, then a slight chance of snow between 1pm and 2pm, then a chance of flurries after 2pm. Partly sunny, with a high near 14. Wind chill values as low as -15. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around -5. Wind chill values as low as -20. Northwest wind 7 to 9 mph.
Friday
Sunny, with a high near 12. Northwest wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around -6.
Saturday
Mostly sunny, with a high near 14.
Saturday Night
Mostly cloudy, with a low around 2.
Sunday
Mostly sunny, with a high near 17.
Sunday Night
Partly cloudy, with a low around 6.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly cloudy, with a low around 12.
Tuesday
Partly sunny, with a high near 27.
Tuesday Night
Mostly cloudy, with a low around 9.
Wednesday
Partly sunny, with a high near 28.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Sinnamahoning PA
 41.35°N 77.94°W (Elev. 1998 ft)
Last Update:
1:05 pm EST Jan 28, 2026
Forecast Valid:
4pm EST Jan 28, 2026-6pm EST Feb 4, 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