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

4 Miles SE Sinnamahoning PA

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 69. Southwest wind around 17 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms. Low around 30. Southwest wind 11 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 around 15 mph, with gusts as high as 33 mph.

    High: 37 °F

    Mostly Cloudy

  • 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. 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

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 69. Southwest wind around 17 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms. Low around 30. Southwest wind 11 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 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. 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 37. Chance of precipitation is 80%.
Monday
Rain and snow showers. High near 52. 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:
4:26 pm EDT Mar 11, 2026
Forecast Valid:
5pm EDT Mar 11, 2026-6pm EDT Mar 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation