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 NW Sinnamahoning PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 55. Southwest wind around 7 mph.

    Low: 55 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Some of the storms could be severe. High near 67. South wind 9 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 67 °F

    Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: Rain showers before 5am, then rain and snow showers likely. Some thunder is also possible. Low around 29. Southwest wind around 17 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Severe
    Thunderstorms
    then
    Rain/Snow

  • Thursday

    Thursday: Snow showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 37. Northwest wind 15 to 17 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Snow Showers
    Likely then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. West wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 27 °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 60%. New snow accumulation of less than a half inch possible.

    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 26. Chance of precipitation is 60%.

    Low: 26 °F

    Rain/Snow
    Likely

  • Saturday

    Saturday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.

    Low: 29 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 55. Southwest wind around 7 mph.
Wednesday
Showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Some of the storms could be severe. High near 67. South wind 9 to 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Rain showers before 5am, then rain and snow showers likely. Some thunder is also possible. Low around 29. Southwest wind around 17 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Thursday
Snow showers likely before 8am. Cloudy through mid morning, then gradual clearing, with a high near 37. Northwest wind 15 to 17 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
Mostly clear, with a low around 27. West wind 7 to 10 mph, with gusts as high as 21 mph.
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 60%. New snow accumulation of less than a half inch possible.
Friday Night
Rain and snow showers likely, mainly before 8pm. Mostly cloudy, with a low around 26. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 40.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Sunday
A chance of rain and snow showers before 2pm, then a chance of rain showers. Mostly cloudy, with a high near 52. Chance of precipitation is 40%.
Sunday Night
Showers. Low around 33. Chance of precipitation is 90%.
Monday
Rain and snow showers. High near 44. Chance of precipitation is 80%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 16. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 26.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Sinnamahoning PA
 41.41°N 78.11°W (Elev. 2169 ft)
Last Update:
2:36 pm EDT Mar 10, 2026
Forecast Valid:
4pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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