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.

Fair

58°F

14°C

Humidity 90%
Wind Speed Calm
Barometer 30.12 in (1019.6 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 16 Aug 3:53 am EDT
Extended Forecast for

Waterloo NY

  • Today

    Today: A slight chance of showers and thunderstorms between 2pm and 5pm. Increasing clouds, with a high near 83. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 3am, then showers likely and possibly a thunderstorm after 5am. Low around 68. South wind 5 to 9 mph becoming light after midnight. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Northwest wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61. Light west wind.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Calm wind becoming west around 6 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.

    High: 79 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely then
    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 2pm and 5pm. Increasing clouds, with a high near 83. Light southeast wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms, mainly before 3am, then showers likely and possibly a thunderstorm after 5am. Low around 68. South wind 5 to 9 mph becoming light after midnight. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Northwest wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 61. Light west wind.
Tuesday
Mostly sunny, with a high near 80. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 54.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 57.
Saturday
A chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Waterloo NY
 42.9°N 76.87°W (Elev. 499 ft)
Last Update:
2:30 am EDT Aug 16, 2026
Forecast Valid:
4am EDT Aug 16, 2026-6pm EDT Aug 22, 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