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.

Mostly Cloudy

27°F

-3°C

Humidity 69%
Wind Speed E 6 mph
Barometer 30.13 in
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 26 Dec 5:15 am EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

Winter Weather Advisory December 26, 12:00pm until December 27, 07:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Snow and sleet before 3pm, then freezing rain and sleet between 3pm and 5pm, then sleet after 5pm. The sleet could be heavy at times. High near 25. Southeast wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. Total daytime snow and sleet accumulation of less than one inch possible.

    High: 25 °F

    Slight Chance
    Snow then
    Wintry Mix

  • Tonight

    Tonight: Freezing rain and sleet likely, mainly before 9pm. Cloudy, with a low around 22. Southeast wind 5 to 11 mph becoming northeast after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. New sleet accumulation of less than a half inch possible.

    Low: 22 °F

    Wintry Mix
    Likely then
    Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 34. Northwest wind around 5 mph becoming calm in the morning.

    High: 34 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24. East wind 3 to 6 mph.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of freezing rain before 1pm, then rain or freezing rain between 1pm and 4pm, then rain showers after 4pm. High near 37. Southeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 37 °F

    Chance
    Freezing Rain
    then
    Rain/Freezing
    Rain

  • Sunday Night

    Sunday Night: Showers. Low around 35. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 35 °F

    Showers

  • Monday

    Monday: Rain showers before 1pm, then snow showers likely. High near 47. Chance of precipitation is 90%.

    High: 47 °F

    Showers then
    Rain/Snow

  • Monday Night

    Monday Night: Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 18. Breezy. Chance of precipitation is 60%.

    Low: 18 °F

    Snow Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A chance of snow showers before 1pm. Mostly cloudy, with a high near 24. Breezy. Chance of precipitation is 40%.

    High: 24 °F

    Chance Snow
    Showers and
    Breezy

Detailed Forecast

Today
Snow and sleet before 3pm, then freezing rain and sleet between 3pm and 5pm, then sleet after 5pm. The sleet could be heavy at times. High near 25. Southeast wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. Little or no ice accumulation expected. Total daytime snow and sleet accumulation of less than one inch possible.
Tonight
Freezing rain and sleet likely, mainly before 9pm. Cloudy, with a low around 22. Southeast wind 5 to 11 mph becoming northeast after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New ice accumulation of less than a 0.1 of an inch possible. New sleet accumulation of less than a half inch possible.
Saturday
Mostly cloudy, with a high near 34. Northwest wind around 5 mph becoming calm in the morning.
Saturday Night
Mostly cloudy, with a low around 24. East wind 3 to 6 mph.
Sunday
A chance of freezing rain before 1pm, then rain or freezing rain between 1pm and 4pm, then rain showers after 4pm. High near 37. Southeast wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Showers. Low around 35. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
Rain showers before 1pm, then snow showers likely. High near 47. Chance of precipitation is 90%.
Monday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 18. Breezy. Chance of precipitation is 60%.
Tuesday
A chance of snow showers before 1pm. Mostly cloudy, with a high near 24. Breezy. Chance of precipitation is 40%.
Tuesday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 27. Chance of precipitation is 40%.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 15. Chance of precipitation is 40%.
New Year's Day
A chance of snow showers. Mostly cloudy, with a high near 21. 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:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
2:26 am EST Dec 26, 2025
Forecast Valid:
5am EST Dec 26, 2025-6pm EST Jan 1, 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