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

36°F

2°C

Humidity 87%
Wind Speed E 5 mph
Barometer 30.07 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 18 Nov 5:55 pm EST
Extended Forecast for

Penfield PA

  • Tonight

    Tonight: Rain and snow, mainly before 2am. Low around 31. Calm wind. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 31 °F

    Rain/Snow

  • Wednesday

    Wednesday: Partly sunny, with a high near 48. Calm wind.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 48. Light south wind.

    High: 48 °F

    Cloudy

  • Thursday Night

    Thursday Night: A chance of showers after 1am. Cloudy, with a low around 38. Light south wind. Chance of precipitation is 40%.

    Low: 38 °F

    Cloudy then
    Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 54. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.

    Low: 31 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Partly sunny, with a high near 48. Chance of precipitation is 30%.

    High: 48 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain and snow, mainly before 2am. Low around 31. Calm wind. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday
Partly sunny, with a high near 48. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 28. Calm wind.
Thursday
Cloudy, with a high near 48. Light south wind.
Thursday Night
A chance of showers after 1am. Cloudy, with a low around 38. Light south wind. Chance of precipitation is 40%.
Friday
A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 54. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A chance of showers. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 32.
Monday
Partly sunny, with a high near 52.
Monday Night
A chance of showers. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 51. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Penfield PA
 41.22°N 78.58°W (Elev. 1306 ft)
Last Update:
6:11 pm EST Nov 18, 2025
Forecast Valid:
6pm EST Nov 18, 2025-6pm EST Nov 25, 2025
 
Forecast Discussion
 
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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