Penn Yan, New York climate: Normal weather by month, frost dates and records
Penn Yan's normal year runs from 18°F January nights to 81°F July afternoons, with 30.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.3°C, January lows of −8°C, July highs of 27°C, 768 mm of precipitation a year.
- NOAA stationPenn Yan Airport
- Station IDUSW00054778
- Location42.64°N 77.06°W
- Elevation903 ft (275 m)
- From the center1 miles
- Population5,024
On October 23, the normal high in Penn Yan is 58°F and the normal low 40°F, and the chance of measurable rain or snow is 44%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Penn Yan.
- Jan 33° 18°
- Feb 35° 19°
- Mar 43° 25°
- Apr 56° 36°
- May 69° 47°
- Jun 77° 57°
- Jul 81° 62°
- Aug 80° 60°
- Sep 73° 53°
- Oct 61° 43°
- Nov 48° 33°
- Dec 38° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Penn Yan each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 18°F. The most precipitation falls in September (3.89 in), the least in February (1.26 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 33°F | 18°F | 25.1°F | 1.49 | 10 | <1 | 28 | 9 h 20 min |
| February | 35°F | 19°F | 26.6°F | 1.26 | 10 | <1 | 25 | 10 h 30 min |
| March | 43°F | 25°F | 34.3°F | 2.06 | 11 | <1 | 23 | 11 h 50 min |
| April | 56°F | 36°F | 45.8°F | 2.81 | 13 | <1 | 11 | 13 h 20 min |
| May | 69°F | 47°F | 57.9°F | 2.88 | 13 | <1 | 1 | 14 h 40 min |
| June | 77°F | 57°F | 66.8°F | 2.77 | 13 | 2 | <1 | 15 h 20 min |
| July | 81°F | 62°F | 71.6°F | 3.39 | 12 | 4 | <1 | 15 h |
| August | 80°F | 60°F | 69.8°F | 2.84 | 13 | 2 | <1 | 14 h |
| September | 73°F | 53°F | 62.8°F | 3.89 | 12 | 1 | <1 | 12 h 30 min |
| October | 61°F | 43°F | 51.6°F | 2.88 | 14 | <1 | 3 | 11 h 10 min |
| November | 48°F | 33°F | 40.5°F | 2.14 | 10 | <1 | 14 | 9 h 50 min |
| December | 38°F | 25°F | 31.3°F | 1.83 | 10 | <1 | 25 | 9 h |
| Year (annual) | 58°F | 40°F | 48.7°F | 30.24 | 141 | 9 | 129 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −8°C | −3.8°C | 38 mm |
| February | 2°C | −7°C | −3.0°C | 32 mm |
| March | 6°C | −4°C | 1.3°C | 52 mm |
| April | 13°C | 2°C | 7.7°C | 71 mm |
| May | 20°C | 8°C | 14.4°C | 73 mm |
| June | 25°C | 14°C | 19.3°C | 70 mm |
| July | 27°C | 17°C | 22.0°C | 86 mm |
| August | 27°C | 16°C | 21.0°C | 72 mm |
| September | 23°C | 11°C | 17.1°C | 99 mm |
| October | 16°C | 6°C | 10.9°C | 73 mm |
| November | 9°C | 0°C | 4.7°C | 54 mm |
| December | 3°C | −4°C | −0.4°C | 46 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Geneva (16 miles away), gets 57 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054778; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Penn Yan?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (12).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054778.
When is the last frost in Penn Yan?
In Penn Yan, the last spring frost (32°F) comes after April 30 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 22 in half of years and before October 5 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 301 year in 10 after May 14; 9 in 10 after April 18
- First autumn frost, half of years before
- October 221 year in 10 before October 5; 9 in 10 before November 4
NOAA puts the median frost-free season at 173 days, and the season without a hard freeze (28°F) at 198 days.
A hard freeze (28°F) comes after April 18 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Penn Yan in zone 6a in ZIP code 14527, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Penn Yan's NOAA station is in zone 6a: the coldest night of a typical year reaches −5°F (20 complete years).
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00054778; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Penn Yan?
In a normal year in Penn Yan, 9 days a year reach 90°F, 129 nights fall to 32°F or colder and 141 days bring measurable precipitation.
- Days at 90°F or more
- 9a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 129a normal year
- Days that stay below freezing
- 45high of 32°F or less
- Days with 0.01 inch of precipitation
- 141a normal year
The highest temperature in this station's record (since 1998) is 101°F, on July 21, 2011; the lowest is −18°F, on January 9, 2004.
The wettest calendar year on that record is 2021, with 34.70 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00054778; records: ACIS (NOAA Regional Climate Centers), station USW00054778. Records use complete months only; a month missing more than three days is left out.
How sunny is Penn Yan?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Penn Yan, 3.6 kWh per square metre a day. August is the sunniest month (76%) and December the cloudiest (50%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.4 |
| February | 58% | 2.2 |
| March | 62% | 3.4 |
| April | 65% | 4.5 |
| May | 69% | 5.4 |
| June | 72% | 5.9 |
| July | 76% | 5.9 |
| August | 76% | 5.2 |
| September | 74% | 4.2 |
| October | 62% | 2.6 |
| November | 59% | 1.7 |
| December | 50% | 1.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Penn Yan need?
A normal year in Penn Yan brings 6,505 heating degree days, 21% more than the median U.S. place (5,373), and 596 cooling degree days, 34% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,679 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,237 | 0 |
| February | 1,074 | 0 |
| March | 952 | 0 |
| April | 578 | 3 |
| May | 253 | 33 |
| June | 59 | 113 |
| July | 9 | 213 |
| August | 18 | 166 |
| September | 127 | 61 |
| October | 422 | 7 |
| November | 734 | 0 |
| December | 1,045 | 0 |
| Year (annual) | 6,505 | 596 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054778. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Penn Yan been warmer than normal lately?
2025 averaged 48.9°F, 0.2°F above the 1991-2020 normal of 48.7°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.9°F | +2.2°F | 34.70 |
| 2022 | 49.3°F | +0.6°F | 28.11 |
| 2023 | 50.5°F | +1.8°F | 30.83 |
| 2024 | 50.9°F | +2.2°F | 29.61 |
| 2025 | 48.9°F | +0.2°F | – |
Source: observed years: ACIS, station USW00054778. A year counts only with all twelve months complete.
How does Penn Yan's climate compare?
Penn Yan is warmer than 87 of the other 130 places with their own NOAA record in New York, and wetter than 1. Across the 7,247 U.S. stations with normals, its annual mean of 48.7°F is warmer than 35%.
In the Köppen classification computed from these normals, Penn Yan is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Penn Yan share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Dundee, NY1,682 people · 9 mi SE
- Keuka Park, NY1,103 people · 3 mi SW
- Dresden, NY292 people · 6 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Penn Yan's climate
What is the coldest month in Penn Yan?
January, with a normal high of 33°F and a normal low of 18°F. The warmest is July (81°F by day, 62°F at night).
Does it snow in Penn Yan?
Yes. NOAA publishes no 1991-2020 snowfall normal for Penn Yan's NOAA station; the nearest record that keeps one, Geneva (16 miles away), records 57 inches of snow in a normal year.
What is the rainiest month in Penn Yan?
September, with 3.89 in of precipitation in a normal year; the driest is February with 1.26 in.
What plant hardiness zone is Penn Yan in?
The USDA's 2023 map puts Penn Yan in zone 6a in ZIP code 14527, the nearest ZIP area. By the same method at Penn Yan's NOAA station, the coldest night of a typical year reaches −5°F (20 years, 1991-2020): zone 6a.
How late can frost come in Penn Yan?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New York climateThe statewide normals and every place in the state
- Geneva, NY16 miles from this station, 47.0°F a year
- Canandaigua, NY18 miles from this station, 48.8°F a year
- Mecklenburg (4 mi SW), NY21 miles from this station, 45.3°F a year
- Aurora, NY21 miles from this station, 47.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made