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 | 86% |
| Wind Speed | SE 8 G 17 mph |
| Barometer | 29.76 in |
| Dewpoint | 23°F (-5°C) |
| Visibility | 1.75 mi |
| Wind Chill | 19°F (-7°C) |
| Last update | 26 Dec 2:15 pm EST |
Extended Forecast for
3 Miles E Sinnamahoning PA
Winter Weather Advisory until December 27, 07:00am
NOW until 7:00am Sat

Winter Weather Advisory
This Afternoon

High: 27 °F
Wintry Mix
Tonight
Low: 24 °F
Wintry Mix
then CloudySaturday

High: 33 °F
Decreasing
CloudsSaturday Night

Low: 22 °F
Mostly Cloudy
Sunday
High: 39 °F
Chance
Rain/Snow
then ShowersSunday Night

Low: 35 °F
Showers
Monday
High: 51 °F
Showers then
Rain/SnowMonday Night

Low: 20 °F
Snow Showers
Likely and
Breezy
Detailed Forecast
This Afternoon
Sleet, possibly mixed with freezing rain. The sleet could be heavy at times. High near 27. Southeast wind around 10 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. Total daytime ice accumulation of less than a 0.1 of an inch possible. Total daytime sleet accumulation of less than one inch possible.
Tonight
Freezing rain and sleet before 10pm, then a chance of freezing rain between 10pm and 11pm. Low around 24. Southeast wind 5 to 9 mph becoming calm. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New ice accumulation of less than a 0.1 of an inch possible. New sleet accumulation of less than a half inch possible.
Saturday
Cloudy, then gradually becoming mostly sunny, with a high near 33. North wind around 6 mph becoming calm in the morning.
Saturday Night
Mostly cloudy, with a low around 22. Light east wind.
Sunday
A chance of snow showers before 10am, then rain showers. High near 39. Southeast wind around 6 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
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 snow showers. High near 51. Chance of precipitation is 90%.
Monday Night
Snow showers likely. Mostly cloudy, with a low around 20. Breezy. Chance of precipitation is 70%.
Tuesday
A chance of snow showers. Mostly cloudy, with a high near 26. Chance of precipitation is 50%.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 20. Chance of precipitation is 40%.
Wednesday
A chance of snow showers. Mostly cloudy, with a high near 28. Chance of precipitation is 50%.
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 22. Chance of precipitation is 30%.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles E Sinnamahoning PA
41.38°N 78°W (Elev. 1988 ft)
41.38°N 78°W (Elev. 1988 ft)
1:32 pm EST Dec 26, 2025
2pm EST Dec 26, 2025-6pm EST Jan 1, 2026



