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

  • Tonight

    Tonight: Clear, with a low around 41. Southwest wind around 7 mph.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. Southwest wind 7 to 10 mph, with gusts as high as 23 mph.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 44. Southwest wind around 6 mph.

    Low: 44 °F

    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67. Southwest wind 5 to 8 mph, with gusts as high as 20 mph.

    High: 67 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain, mainly after 2am. Mostly cloudy, with a low around 55. South wind around 6 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Slight Chance
    Rain then
    Chance Rain

  • Wednesday

    Wednesday: Rain, mainly after 8am. High near 66. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 66 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain showers before 2am, then rain and snow showers likely. Low around 36. Chance of precipitation is 90%.

    Low: 36 °F

    Rain then
    Rain/Snow

  • Thursday

    Thursday: Rain and snow showers likely before 8am, then a chance of snow showers between 8am and 2pm. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.

    High: 38 °F

    Rain/Snow
    Likely then
    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 41. Southwest wind around 7 mph.
Monday
Sunny, with a high near 63. Southwest wind 7 to 10 mph, with gusts as high as 23 mph.
Monday Night
Clear, with a low around 44. Southwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 67. Southwest wind 5 to 8 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of rain, mainly after 2am. Mostly cloudy, with a low around 55. South wind around 6 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain, mainly after 8am. High near 66. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Rain showers before 2am, then rain and snow showers likely. Low around 36. Chance of precipitation is 90%.
Thursday
Rain and snow showers likely before 8am, then a chance of snow showers between 8am and 2pm. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.
Thursday Night
Partly cloudy, with a low around 26.
Friday
A chance of snow showers before 2pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 46. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 42.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Sunday
A chance of rain and snow showers. Mostly cloudy, with a high near 46. Chance of precipitation is 50%.
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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:
10:01 pm EDT Mar 8, 2026
Forecast Valid:
10pm EDT Mar 8, 2026-6pm EDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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