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

27°F

-3°C

Humidity 54%
Wind Speed E 9 G 17 mph
Barometer 30.09 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 26 Dec 7:55 am EST
Extended Forecast for

6 Miles ESE 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 likely before 2pm, then sleet. The sleet could be heavy at times. High near 26. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Total daytime snow and sleet accumulation of less than one inch possible.

    High: 26 °F

    Slight Chance
    Snow then
    Snow/Sleet

  • Tonight

    Tonight: Freezing rain and sleet likely, mainly before 9pm. Cloudy, with a low around 22. Southeast wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%. 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. North 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 around 6 mph.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of freezing rain before 10am, then a chance of rain or freezing rain between 10am and 1pm, then rain showers after 1pm. 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
    Rain/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 a chance of rain and snow showers. High near 48. Chance of precipitation is 90%.

    High: 48 °F

    Showers then
    Rain/Snow

  • Monday Night

    Monday Night: Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 20. Breezy. Chance of precipitation is 60%.

    Low: 20 °F

    Snow Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A chance of snow showers before 1pm. Mostly cloudy, with a high near 25. Breezy. Chance of precipitation is 30%.

    High: 25 °F

    Chance Snow
    Showers and
    Breezy

Detailed Forecast

Today
Snow and sleet likely before 2pm, then sleet. The sleet could be heavy at times. High near 26. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. 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 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%. 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. North wind around 5 mph becoming calm in the morning.
Saturday Night
Mostly cloudy, with a low around 24. East wind around 6 mph.
Sunday
A chance of freezing rain before 10am, then a chance of rain or freezing rain between 10am and 1pm, then rain showers after 1pm. 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 a chance of rain and snow showers. High near 48. Chance of precipitation is 90%.
Monday Night
Snow showers likely, mainly before 1am. Mostly cloudy, with a low around 20. Breezy. Chance of precipitation is 60%.
Tuesday
A chance of snow showers before 1pm. Mostly cloudy, with a high near 25. Breezy. Chance of precipitation is 30%.
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 29. Chance of precipitation is 40%.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 16. Chance of precipitation is 30%.
New Year's Day
Mostly cloudy, with a high near 23.
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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:
7:06 am EST Dec 26, 2025
Forecast Valid:
8am EST Dec 26, 2025-6pm EST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

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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