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 NW Sinnamahoning PA

  • This Afternoon

    This Afternoon: Sunny, with a high near 39. West wind around 14 mph, with gusts as high as 30 mph.

    High: 39 °F

    Sunny

  • Tonight

    Tonight: A chance of snow showers, mainly between 1am and 5am. Increasing clouds, with a low around 29. Northwest wind around 6 mph becoming light and variable. Chance of precipitation is 30%.

    Low: 29 °F

    Partly Cloudy
    then Chance
    Snow Showers

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 50. South wind 11 to 15 mph, with gusts as high as 34 mph.

    High: 50 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Increasing clouds, with a low around 44. Southeast wind 15 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers. High near 60. South wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 60 °F

    Showers

  • Monday Night

    Monday Night: Snow showers likely, possibly mixed with rain, becoming all snow after 11pm. Mostly cloudy, with a low around 18. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 18 °F

    Rain/Snow
    Likely then
    Snow Showers
    Likely

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 25.

    High: 25 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 34.

    High: 34 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 39. West wind around 14 mph, with gusts as high as 30 mph.
Tonight
A chance of snow showers, mainly between 1am and 5am. Increasing clouds, with a low around 29. Northwest wind around 6 mph becoming light and variable. Chance of precipitation is 30%.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 50. South wind 11 to 15 mph, with gusts as high as 34 mph.
Sunday Night
Showers likely, mainly after 2am. Increasing clouds, with a low around 44. Southeast wind 15 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers. High near 60. South wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
Snow showers likely, possibly mixed with rain, becoming all snow after 11pm. Mostly cloudy, with a low around 18. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Tuesday
Mostly cloudy, with a high near 25.
Tuesday Night
Mostly cloudy, with a low around 16.
Wednesday
Mostly cloudy, with a high near 34.
Wednesday Night
A chance of snow showers after 2am. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Thursday
A chance of snow showers. Mostly cloudy, with a high near 45. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 32.
Friday
Partly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Sinnamahoning PA
 41.44°N 78.1°W (Elev. 1818 ft)
Last Update:
2:28 pm EDT Mar 14, 2026
Forecast Valid:
2pm EDT Mar 14, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation