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.

Overcast

71°F

22°C

Humidity 71%
Wind Speed SW 6 mph
Barometer 29.97 in (1014.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 25 Jul 11:53 pm EDT
Extended Forecast for

Williams Corner NY

  • Overnight

    Overnight: A slight chance of showers before 2am. Mostly cloudy, with a low around 64. Light southwest wind. Chance of precipitation is 20%.

    Low: 64 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 83. Light and variable wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 2am, then a chance of showers between 2am and 3am. Mostly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 66. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 90%.

    High: 79 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.

    Low: 61 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers before 2am. Mostly cloudy, with a low around 64. Light southwest wind. Chance of precipitation is 20%.
Sunday
A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 83. Light and variable wind becoming west around 5 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms before 2am, then a chance of showers between 2am and 3am. Mostly cloudy, with a low around 65. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 66. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 70%.
Tuesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 90%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Wednesday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 77. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 64.
Saturday
A chance of showers. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Williams Corner NY
 42.72°N 77.26°W (Elev. 797 ft)
Last Update:
7:28 pm EDT Jul 25, 2026
Forecast Valid:
12am EDT Jul 26, 2026-6pm EDT Aug 1, 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