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.

Light Snow

16°F

-9°C

Humidity 77%
Wind Speed NW 13 G 26 mph
Barometer 29.92 in (1014.8 mb)
Dewpoint 10°F (-12°C)
Visibility 3.00 mi
Wind Chill2°F (-17°C)
Last update 24 Feb 1:53 am EST
Extended Forecast for

Rock Stream NY

  • Overnight

    Overnight: Snow showers likely, mainly before 3am. Mostly cloudy, with a low around 10. Wind chill values as low as -3. Northwest wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.

    Low: 10 °F

    Snow Showers
    Likely

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 24. Wind chill values as low as -5. West wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 24 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow showers, mainly after midnight. Temperature rising to around 28 by 4am. South wind 5 to 13 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    Low: 21 °F⇑

    Chance Snow
    Showers then
    Snow Showers

  • Wednesday

    Wednesday: A chance of snow showers before 4pm, then a chance of rain and snow showers. Partly sunny, with a high near 40. South wind 11 to 14 mph becoming west in the afternoon. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 40 °F

    Slight Chance
    Snow Showers
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A chance of rain and snow showers before 10pm, then a slight chance of snow showers between 10pm and 1am. Mostly cloudy, with a low around 21. West wind 6 to 8 mph. Chance of precipitation is 30%.

    Low: 21 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Thursday

    Thursday: A slight chance of snow showers after 1pm. Partly sunny, with a high near 31. Chance of precipitation is 20%.

    High: 31 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 38.

    High: 38 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Overnight
Snow showers likely, mainly before 3am. Mostly cloudy, with a low around 10. Wind chill values as low as -3. Northwest wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of around an inch possible.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 24. Wind chill values as low as -5. West wind 6 to 13 mph, with gusts as high as 23 mph.
Tuesday Night
Snow showers, mainly after midnight. Temperature rising to around 28 by 4am. South wind 5 to 13 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Wednesday
A chance of snow showers before 4pm, then a chance of rain and snow showers. Partly sunny, with a high near 40. South wind 11 to 14 mph becoming west in the afternoon. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Wednesday Night
A chance of rain and snow showers before 10pm, then a slight chance of snow showers between 10pm and 1am. Mostly cloudy, with a low around 21. West wind 6 to 8 mph. Chance of precipitation is 30%.
Thursday
A slight chance of snow showers after 1pm. Partly sunny, with a high near 31. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Sunny, with a high near 38.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Sunday
A chance of snow. Partly sunny, with a high near 25. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 11.
Monday
A chance of snow. Partly sunny, with a high near 24. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rock Stream NY
 42.46°N 76.92°W (Elev. 879 ft)
Last Update:
1:18 am EST Feb 24, 2026
Forecast Valid:
2am EST Feb 24, 2026-6pm EST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation