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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles E Sinnamahoning PA

  • Tonight

    Tonight: Mostly clear, with a low around 47. Southwest wind 3 to 7 mph.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 67. Southwest wind 3 to 8 mph. Winds could gust as high as 20 mph.

    High: 67 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 56. Southwest wind 3 to 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Showers, with thunderstorms also possible after 5pm. High near 69. South wind 6 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 69 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain showers before 5am, then rain and snow showers likely. Some thunder is also possible. Low around 32. Southwest wind 10 to 13 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 32 °F

    Showers then
    Rain/Snow

  • Thursday

    Thursday: Snow showers likely, mainly before 8am. Mostly cloudy, with a high near 39. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Snow Showers
    Likely then
    Slight Chance
    Snow Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Friday

    Friday: A chance of snow showers before 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.

    High: 43 °F

    Chance Snow
    Showers then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: Rain and snow showers likely, mainly before 8pm. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.

    Low: 28 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 47. Southwest wind 3 to 7 mph.
Tuesday
Partly sunny, with a high near 67. Southwest wind 3 to 8 mph. Winds could gust as high as 20 mph.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 56. Southwest wind 3 to 5 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers, with thunderstorms also possible after 5pm. High near 69. South wind 6 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain showers before 5am, then rain and snow showers likely. Some thunder is also possible. Low around 32. Southwest wind 10 to 13 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday
Snow showers likely, mainly before 8am. Mostly cloudy, with a high near 39. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
Mostly clear, with a low around 25.
Friday
A chance of snow showers before 2pm, then rain and snow showers likely. Mostly cloudy, with a high near 43. Chance of precipitation is 70%.
Friday Night
Rain and snow showers likely, mainly before 8pm. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 31. Chance of precipitation is 50%.
Sunday
A chance of rain and snow showers. Mostly cloudy, with a high near 54. Chance of precipitation is 50%.
Sunday Night
Rain and snow showers. Low around 30. Chance of precipitation is 80%.
Monday
Rain and snow showers. High near 38. Chance of precipitation is 80%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Sinnamahoning PA
 41.38°N 78°W (Elev. 1988 ft)
Last Update:
2:26 pm EDT Mar 9, 2026
Forecast Valid:
5pm EDT Mar 9, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation