Current conditions at

Penn Yan, Penn Yan Airport (KPEO)

Lat: 42.64°NLon: 77.05°WElev: 902ft.

Overcast

69°F

21°C

Humidity 96%
Wind Speed Calm
Barometer 30.32 in (1026.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 16 Sep 10:53 pm EDT
Extended Forecast for

Rock Stream NY

  • Tonight

    Tonight: Patchy fog before 2am, then patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Patchy Fog

  • Thursday

    Thursday: Showers before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers after 2pm.  High near 75. Calm wind becoming north around 5 mph in the afternoon.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 58. Light northwest wind.

    Low: 58 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 70. North wind 5 to 11 mph.

    High: 70 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. North wind around 5 mph becoming calm  in the evening.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Showers, mainly after 2am.  Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Chance
    Showers then
    Showers

  • Sunday

    Sunday: Showers, mainly before 2pm.  High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Showers

  • Sunday Night

    Sunday Night: A chance of showers before 8pm.  Mostly cloudy, with a low around 53. Chance of precipitation is 30%.

    Low: 53 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog before 2am, then patchy fog after 5am. Otherwise, mostly cloudy, with a low around 64. Calm wind.
Thursday
Showers before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers after 2pm. High near 75. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 58. Light northwest wind.
Friday
Sunny, with a high near 70. North wind 5 to 11 mph.
Friday Night
Partly cloudy, with a low around 50. North wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 66.
Saturday Night
Showers, mainly after 2am. Low around 56. Chance of precipitation is 80%.
Sunday
Showers, mainly before 2pm. High near 66. Chance of precipitation is 80%.
Sunday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Monday
A chance of showers after 2pm. Partly sunny, with a high near 63. Chance of precipitation is 30%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 50%.
Tuesday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Wednesday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Rock Stream NY
 42.46°N 76.92°W (Elev. 879 ft)
7:02 pm EDT Sep 16, 2026
11pm EDT Sep 16, 2026-6pm EDT Sep 23, 2026
 
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