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

4 Miles SE Sinnamahoning PA

  • Overnight

    Overnight: Showers, mainly before 1am. Low around 30. West wind 13 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 30 °F

    Showers

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 37. Northwest wind around 15 mph, with gusts as high as 33 mph.

    High: 37 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. West wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow before 2pm, then a chance of rain and snow between 2pm and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 47. South wind 8 to 13 mph, with gusts as high as 37 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    High: 47 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain and snow before 11pm, then a slight chance of snow between 11pm and 2am. Partly cloudy, with a low around 28. West wind around 14 mph, with gusts as high as 34 mph. 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 27. Chance of precipitation is 40%.

    Low: 27 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Sunday

    Sunday: A chance of snow showers before 2pm. Mostly cloudy, with a high near 50. Chance of precipitation is 40%.

    High: 50 °F

    Chance Snow
    Showers

  • Sunday Night

    Sunday Night: Showers, mainly after 2am. Low around 41. Chance of precipitation is 80%.

    Low: 41 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
Showers, mainly before 1am. Low around 30. West wind 13 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 37. Northwest wind around 15 mph, with gusts as high as 33 mph.
Thursday Night
Partly cloudy, with a low around 27. West wind 6 to 10 mph, with gusts as high as 21 mph.
Friday
A chance of snow before 2pm, then a chance of rain and snow between 2pm and 5pm, then a chance of rain after 5pm. Mostly cloudy, with a high near 47. South wind 8 to 13 mph, with gusts as high as 37 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Friday Night
A chance of rain and snow before 11pm, then a slight chance of snow between 11pm and 2am. Partly cloudy, with a low around 28. West wind around 14 mph, with gusts as high as 34 mph. 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 27. Chance of precipitation is 40%.
Sunday
A chance of snow showers before 2pm. Mostly cloudy, with a high near 50. Chance of precipitation is 40%.
Sunday Night
Showers, mainly after 2am. Low around 41. Chance of precipitation is 80%.
Monday
Rain, possibly mixed with snow showers, mainly before 2pm. High near 49. 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 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
8:16 pm EDT Mar 11, 2026
Forecast Valid:
12am EDT Mar 12, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation