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

Hazardous Weather Conditions

Current conditions at

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

50°F

10°C

Humidity 88%
Wind Speed SW 12 G 21 mph
Barometer 29.32 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 29 Dec 6:35 am EST
Extended Forecast for

4 Miles NW Sinnamahoning PA

Wind Advisory December 29, 06:43am until December 30, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 29, 06:43am until December 30, 12:00pm

    NOW until 12:00pm Tue

    Wind Advisory

  • Today

    High: 46 °F⇓

    Rain/Snow
    Likely then
    Snow Showers
    Likely and
    Breezy

  • Tonight

    Tonight: Snow showers likely, mainly before 3am. Patchy blowing snow before 1am. Mostly cloudy, with a low around 18. Breezy, with a west wind around 22 mph, with gusts as high as 48 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 18 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Tuesday

    Tuesday: A chance of snow showers, mainly between 7am and 1pm. Patchy blowing snow before 11am. Mostly cloudy, with a high near 24. Breezy, with a west wind 16 to 21 mph, with gusts as high as 47 mph. Chance of precipitation is 40%.

    High: 24 °F

    Chance Snow
    Showers and
    Patchy
    Blowing Snow

  • Tuesday Night

    Tuesday Night: A chance of snow showers. Mostly cloudy, with a low around 19. West wind 13 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Chance Snow
    Showers

  • Wednesday

    Wednesday: Snow showers, mainly after 1pm. High near 28. West wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 28 °F

    Chance Snow
    Showers then
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before 1am. Low around 12. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 12 °F

    Snow Showers

  • New Year's Day

    New Year's Day: A chance of snow showers before 1pm. Mostly cloudy, with a high near 19. Chance of precipitation is 30%.

    High: 19 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 11.

    Low: 11 °F

    Mostly Cloudy

Detailed Forecast

Today
Rain showers likely before 11am, then snow showers likely. Mostly cloudy, with a temperature falling to around 25 by 4pm. Breezy, with a west wind 13 to 20 mph, with gusts as high as 49 mph. Chance of precipitation is 70%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow showers likely, mainly before 3am. Patchy blowing snow before 1am. Mostly cloudy, with a low around 18. Breezy, with a west wind around 22 mph, with gusts as high as 48 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Tuesday
A chance of snow showers, mainly between 7am and 1pm. Patchy blowing snow before 11am. Mostly cloudy, with a high near 24. Breezy, with a west wind 16 to 21 mph, with gusts as high as 47 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 19. West wind 13 to 15 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday
Snow showers, mainly after 1pm. High near 28. West wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday Night
Snow showers, mainly before 1am. Low around 12. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
New Year's Day
A chance of snow showers before 1pm. Mostly cloudy, with a high near 19. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Mostly cloudy, with a high near 21.
Friday Night
Mostly cloudy, with a low around 14.
Saturday
Mostly cloudy, with a high near 26.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
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:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
5:31 am EST Dec 29, 2025
Forecast Valid:
6am EST Dec 29, 2025-6pm EST Jan 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