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.

Overcast

43°F

6°C

Humidity 93%
Wind Speed W 5 mph
Barometer 29.93 in
Dewpoint 41°F (5°C)
Visibility 1.25 mi
Wind Chill40°F (4°C)
Last update 22 Nov 2:35 am EST
Extended Forecast for

4 Miles ESE Sinnamahoning PA

  • Overnight

    Overnight: Showers. Patchy fog. Low around 37. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Showers and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of showers before 8am. Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 49. Northwest wind 3 to 5 mph. Chance of precipitation is 20%.

    High: 49 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers before 1pm. Partly sunny, with a high near 46. West wind 5 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 32. West wind 7 to 9 mph, with gusts as high as 22 mph.

    Low: 32 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Showers. High near 48. Chance of precipitation is 80%.

    High: 48 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers, mainly before 1am. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Showers

Detailed Forecast

Overnight
Showers. Patchy fog. Low around 37. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers before 8am. Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 49. Northwest wind 3 to 5 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 30. Calm wind.
Sunday
A slight chance of showers before 1pm. Partly sunny, with a high near 46. West wind 5 to 10 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 32. West wind 7 to 9 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 50.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
Showers. High near 48. Chance of precipitation is 80%.
Tuesday Night
Showers, mainly before 1am. Low around 42. Chance of precipitation is 80%.
Wednesday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Thanksgiving Day
Mostly cloudy, with a high near 40.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Friday
A chance of snow showers. Mostly cloudy, with a high near 36. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Sinnamahoning PA
 41.36°N 78°W (Elev. 1598 ft)
Last Update:
1:05 am EST Nov 22, 2025
Forecast Valid:
2am EST Nov 22, 2025-6pm EST Nov 28, 2025
 
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