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

37°F

3°C

Humidity 81%
Wind Speed NW 5 mph
Barometer 30.20 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 10 Jan 12:15 am EST
Extended Forecast for

2 Miles SSW Sinnamahoning PA

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 33. Northwest wind 3 to 6 mph.

    Low: 33 °F

    Patchy Fog

  • Saturday

    Saturday: Rain, mainly after noon. Patchy fog before 9am. High near 45. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 45 °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 30. Southeast wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain then
    Rain/Snow

  • Sunday

    Sunday: A chance of snow showers. Partly sunny, with a high near 36. West wind 9 to 11 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 36 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 26. West wind 10 to 13 mph, with gusts as high as 39 mph.

    Low: 26 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 33. Northwest wind 3 to 6 mph.
Saturday
Rain, mainly after noon. Patchy fog before 9am. High near 45. Light and variable wind becoming southeast 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 30. Southeast wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Sunday
A chance of snow showers. Partly sunny, with a high near 36. West wind 9 to 11 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly cloudy, with a low around 26. West wind 10 to 13 mph, with gusts as high as 39 mph.
Monday
Mostly sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Partly sunny, with a high near 44.
Tuesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Wednesday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Thursday
Partly sunny, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 17.
Friday
Partly sunny, with a high near 32.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Sinnamahoning PA
 41.34°N 78.06°W (Elev. 899 ft)
Last Update:
9:51 pm EST Jan 9, 2026
Forecast Valid:
12am EST Jan 10, 2026-6pm EST Jan 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation