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

46°F

8°C

Humidity 87%
Wind Speed S 10 G 18 mph
Barometer 29.95 in
Dewpoint 43°F (6°C)
Visibility 7.00 mi
Wind Chill41°F (5°C)
Last update 9 Jan 10:55 am EST
Extended Forecast for

Penfield PA

  • Today

    Today: Rain, mainly before 2pm. High near 55. South wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Rain

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 21 mph.

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain, mainly after 1pm. High near 42. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 42 °F

    Chance Rain
    then Rain

  • Saturday Night

    Saturday Night: Rain before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain after 4am. Low around 29. Light and variable wind becoming west 5 to 9 mph in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 29 °F

    Rain then
    Rain/Snow

  • Sunday

    Sunday: Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 33. West wind 9 to 16 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Chance Snow
    Showers then
    Snow Showers
    Likely

  • Sunday Night

    Sunday Night: A slight chance of snow showers before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 20%.

    Low: 23 °F

    Slight Chance
    Snow Showers

  • Monday

    Monday: Partly sunny, with a high near 34.

    High: 34 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny

Detailed Forecast

Today
Rain, mainly before 2pm. High near 55. South wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Mostly cloudy, with a low around 34. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 21 mph.
Saturday
Rain, mainly after 1pm. High near 42. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain before 1am, then a slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain after 4am. Low around 29. Light and variable wind becoming west 5 to 9 mph in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Sunday
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 33. West wind 9 to 16 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday Night
A slight chance of snow showers before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 20%.
Monday
Partly sunny, with a high near 34.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Partly sunny, with a high near 42.
Tuesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Wednesday
Rain likely. Mostly cloudy, with a high near 40. Chance of precipitation is 60%.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 50%.
Thursday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Penfield PA
 41.22°N 78.58°W (Elev. 1306 ft)
Last Update:
7:34 am EST Jan 9, 2026
Forecast Valid:
11am EST Jan 9, 2026-6pm EST Jan 15, 2026
 
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Additional Resources

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Chance of Precipitation