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

55°F

13°C

Humidity 51%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 17 Oct 9:55 pm EDT
Extended Forecast for

4 Miles SE Sinnamahoning PA

  • Tonight

    Tonight: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 45. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 69. South wind 3 to 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 50. South wind around 7 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Showers, mainly after 2pm. High near 71. South wind 8 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 71 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 47. South wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 47 °F

    Showers

  • Monday

    Monday: A chance of showers before 2pm. Partly sunny, with a high near 58. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers after 8am. Partly sunny, with a high near 59. Chance of precipitation is 50%.

    High: 59 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.

    Low: 41 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers, mainly after 1am. Mostly cloudy, with a low around 45. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 69. South wind 3 to 6 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 50. South wind around 7 mph. Chance of precipitation is 20%.
Sunday
Showers, mainly after 2pm. High near 71. South wind 8 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers and possibly a thunderstorm. Low around 47. South wind around 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Monday
A chance of showers before 2pm. Partly sunny, with a high near 58. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Mostly clear, with a low around 41.
Tuesday
A chance of showers after 8am. Partly sunny, with a high near 59. Chance of precipitation is 50%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 50. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Thursday
A chance of showers. Mostly cloudy, with a high near 54. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 40. Chance of precipitation is 40%.
Friday
A chance of showers. Partly sunny, with a high near 54. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Sinnamahoning PA
 41.34°N 78°W (Elev. 1906 ft)
Last Update:
8:06 pm EDT Oct 17, 2025
Forecast Valid:
10pm EDT Oct 17, 2025-6pm EDT Oct 24, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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