National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Penn Yan, Penn Yan Airport (KPEO)

Lat: 42.64°NLon: 77.05°WElev: 902ft.

Mostly Cloudy

65°F

18°C

Humidity 81%
Wind Speed Calm
Barometer 30.01 in (1015.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 20 Aug 3:53 am EDT
Extended Forecast for

Marsh Corner NY

  • Today

    Today: Patchy fog between 7am and 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind.

    High: 74 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78. Calm wind.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Light and variable wind.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 79. South wind around 7 mph. Chance of precipitation is 70%.

    High: 79 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.

    Low: 61 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, mainly after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 70%.

    High: 77 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely before 8pm. Partly cloudy, with a low around 56. Chance of precipitation is 60%.

    Low: 56 °F

    Showers
    Likely then
    Partly Cloudy

  • Monday

    Monday: A chance of showers after 2pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Today
Patchy fog between 7am and 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 74. Calm wind.
Tonight
Mostly clear, with a low around 55. Calm wind.
Friday
Sunny, with a high near 78. Calm wind.
Friday Night
Mostly clear, with a low around 60. Light and variable wind.
Saturday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 79. South wind around 7 mph. Chance of precipitation is 70%.
Saturday Night
Showers and thunderstorms likely before 11pm, then a chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Sunday
Showers likely, mainly after 2pm. Partly sunny, with a high near 77. Chance of precipitation is 70%.
Sunday Night
Showers likely before 8pm. Partly cloudy, with a low around 56. Chance of precipitation is 60%.
Monday
A chance of showers after 2pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Monday Night
A chance of showers before 8pm. Partly cloudy, with a low around 56. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Marsh Corner NY
 42.74°N 76.78°W (Elev. 551 ft)
Last Update:
2:30 am EDT Aug 20, 2026
Forecast Valid:
4am EDT Aug 20, 2026-6pm EDT Aug 26, 2026
 
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