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

Hazardous Weather Conditions

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

6 Miles ESE Sinnamahoning PA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 69. Southwest wind around 18 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms. Low around 30. Southwest wind 13 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 30 °F

    T-storms then
    Showers

  • Thursday

    Thursday: Mostly cloudy, with a high near 37. Northwest wind 14 to 17 mph, with gusts as high as 32 mph.

    High: 37 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. West wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of snow before 11am, then a chance of rain and snow between 11am and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 47. South wind 9 to 15 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 47 °F

    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain before 11pm, then a slight chance of snow between 11pm and 2am. Partly cloudy, with a low around 28. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 28 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of snow showers after 2am. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.

    Low: 28 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Sunday

    Sunday: A chance of snow showers before 2pm. Mostly cloudy, with a high near 49. Chance of precipitation is 40%.

    High: 49 °F

    Chance Snow
    Showers

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly before 5pm. Mostly cloudy, with a high near 69. Southwest wind around 18 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms. Low around 30. Southwest wind 13 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Mostly cloudy, with a high near 37. Northwest wind 14 to 17 mph, with gusts as high as 32 mph.
Thursday Night
Partly cloudy, with a low around 27. West wind 6 to 11 mph, with gusts as high as 21 mph.
Friday
A slight chance of snow before 11am, then a chance of rain and snow between 11am and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 47. South wind 9 to 15 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Friday Night
A chance of rain before 11pm, then a slight chance of snow between 11pm and 2am. Partly cloudy, with a low around 28. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
A chance of snow showers after 2am. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Sunday
A chance of snow showers before 2pm. Mostly cloudy, with a high near 49. Chance of precipitation is 40%.
Sunday Night
Showers, mainly after 2am. Low around 38. Chance of precipitation is 80%.
Monday
Rain and snow showers. High near 53. Chance of precipitation is 80%.
Monday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 19. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 28.
Tuesday Night
Partly cloudy, with a low around 16.
Wednesday
Mostly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Sinnamahoning PA
 41.35°N 77.94°W (Elev. 1998 ft)
Last Update:
4:26 pm EDT Mar 11, 2026
Forecast Valid:
4pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation