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

71°F

22°C

Humidity 61%
Wind Speed NW 9 mph
Barometer 30.05 in (1017.0 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Aug 5:53 pm EDT
Extended Forecast for

Waterloo NY

  • Tonight

    Tonight: Partly cloudy, with a low around 55. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81. South wind 3 to 5 mph.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64. South wind around 6 mph.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 83. South wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Chance
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 60. Light southwest wind. Chance of precipitation is 80%.

    Low: 60 °F

    Showers then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. Northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 81. South wind 3 to 5 mph.
Wednesday Night
Partly cloudy, with a low around 64. South wind around 6 mph.
Thursday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 83. South wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Low around 60. Light southwest wind. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 64.
Monday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waterloo NY
 42.9°N 76.87°W (Elev. 499 ft)
Last Update:
2:30 pm EDT Aug 25, 2026
Forecast Valid:
6pm EDT Aug 25, 2026-6pm EDT Sep 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