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

41°F

5°C

Humidity 76%
Wind Speed NW 12 mph
Barometer 30.20 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 9 Jan 10:15 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 5 to 10 mph becoming light north after midnight. Winds could gust as high as 23 mph.

    Low: 31 °F

    Cloudy then
    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 5 to 10 mph becoming light north after midnight. Winds could gust as high as 23 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:
10pm EST Jan 9, 2026-6pm EST Jan 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation