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

St Marys Municipal Airport (KOYM)

Lat: 41.41°NLon: 78.5°WElev: 1934ft.

Overcast

39°F

4°C

Humidity 81%
Wind Speed NW 8 mph
Barometer 30.20 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 9 Jan 10:55 pm EST
Extended Forecast for

3 Miles NW Sinnamahoning PA

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 31. Northwest wind 3 to 8 mph.

    Low: 31 °F

    Patchy Fog

  • Saturday

    Saturday: Rain, mainly after noon. Patchy fog before 9am. High near 40. Light and variable wind becoming east around 6 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 40 °F

    Patchy Fog
    then Rain

  • Saturday Night

    Saturday Night: Rain before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of snow showers after 4am. Low around 27. Southeast wind 9 to 14 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 27 °F

    Rain then
    Rain/Snow

  • Sunday

    Sunday: A chance of snow showers. Partly sunny, with a high near 31. West wind 13 to 17 mph, with gusts as high as 38 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 31 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: A slight chance of snow showers before 1am. Mostly cloudy, with a low around 23. West wind 14 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.

    Low: 23 °F

    Slight Chance
    Snow Showers

  • Monday

    Monday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 31. Northwest wind 3 to 8 mph.
Saturday
Rain, mainly after noon. Patchy fog before 9am. High near 40. Light and variable wind becoming east around 6 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of snow showers after 4am. Low around 27. Southeast wind 9 to 14 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Sunday
A chance of snow showers. Partly sunny, with a high near 31. West wind 13 to 17 mph, with gusts as high as 38 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Sunday Night
A slight chance of snow showers before 1am. Mostly cloudy, with a low around 23. West wind 14 to 18 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 33.
Monday Night
Partly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 39.
Tuesday Night
A chance of snow after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Wednesday
Rain and snow likely, mainly after 1pm. Mostly cloudy, with a high near 37. Chance of precipitation is 60%.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 26.
Thursday Night
Mostly cloudy, with a low around 14.
Friday
Partly sunny, with a high near 27.
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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:
9:51 pm EST Jan 9, 2026
Forecast Valid:
11pm EST Jan 9, 2026-6pm EST Jan 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation