Willsboro, New York climate: Normal weather by month, frost dates and records
Willsboro's normal year runs from 11°F January nights to 80°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.9°C, January lows of −12°C, July highs of 27°C.
- NOAA stationWillsboro (1 mi N)
- Station IDUSC00309495
- Location44.38°N 73.38°W
- Elevation180 ft (55 m)
- Population (census place)648
On October 23, the normal high in Willsboro is 55°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Willsboro.
- Jan 29° 11°
- Feb 31° 12°
- Mar 39° 22°
- Apr 54° 34°
- May 66° 46°
- Jun 76° 56°
- Jul 80° 61°
- Aug 79° 60°
- Sep 71° 52°
- Oct 58° 41°
- Nov 46° 31°
- Dec 35° 21°
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 Willsboro each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 11°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 29°F | 11°F | 19.9°F | – | <1 | 29 | 9 h 10 min |
| February | 31°F | 12°F | 21.4°F | – | <1 | 27 | 10 h 30 min |
| March | 39°F | 22°F | 30.7°F | – | <1 | 26 | 11 h 50 min |
| April | 54°F | 34°F | 43.9°F | – | <1 | 12 | 13 h 20 min |
| May | 66°F | 46°F | 56.4°F | – | <1 | 1 | 14 h 50 min |
| June | 76°F | 56°F | 65.9°F | – | 1 | <1 | 15 h 30 min |
| July | 80°F | 61°F | 70.8°F | – | 2 | <1 | 15 h 10 min |
| August | 79°F | 60°F | 69.1°F | – | 2 | <1 | 14 h 10 min |
| September | 71°F | 52°F | 61.6°F | – | 1 | <1 | 12 h 40 min |
| October | 58°F | 41°F | 49.4°F | – | <1 | 7 | 11 h |
| November | 46°F | 31°F | 38.4°F | – | <1 | 17 | 9 h 40 min |
| December | 35°F | 21°F | 27.7°F | – | <1 | 27 | 8 h 50 min |
| Year (annual) | 55°F | 37°F | 46.3°F | – | 6 | 145 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | −2°C | −12°C | −6.7°C |
| February | −1°C | −11°C | −5.9°C |
| March | 4°C | −6°C | −0.7°C |
| April | 12°C | 1°C | 6.6°C |
| May | 19°C | 8°C | 13.6°C |
| June | 24°C | 13°C | 18.8°C |
| July | 27°C | 16°C | 21.6°C |
| August | 26°C | 15°C | 20.6°C |
| September | 22°C | 11°C | 16.4°C |
| October | 15°C | 5°C | 9.7°C |
| November | 8°C | −1°C | 3.6°C |
| December | 2°C | −6°C | −2.4°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Burlington (13 miles away), gets 88 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00309495; 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 Willsboro?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00309495.
When is the last frost in Willsboro?
In Willsboro, the last spring frost (32°F) comes after May 2 in half of years and after May 16 in one year in ten; the first autumn frost comes before October 14 in half of years and before October 2 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
- May 21 year in 10 after May 16; 9 in 10 after April 20
- First autumn frost, half of years before
- October 141 year in 10 before October 2; 9 in 10 before November 1
NOAA puts the median frost-free season at 165 days, and the season without a hard freeze (28°F) at 189 days.
A hard freeze (28°F) comes after April 21 in half of springs and before October 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Willsboro in zone 5a in ZIP code 12996, the nearest ZIP area.
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00309495; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Willsboro?
In a normal year in Willsboro, 6 days a year reach 90°F and 145 nights fall to 32°F or colder.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 145a normal year
- Days that stay below freezing
- 58high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00309495.
How sunny is Willsboro?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Willsboro, 3.5 kWh per square metre a day. August is the sunniest month (75%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 60% | 1.5 |
| February | 62% | 2.3 |
| March | 65% | 3.4 |
| April | 66% | 4.5 |
| May | 67% | 5.2 |
| June | 69% | 5.6 |
| July | 74% | 5.7 |
| August | 75% | 5.1 |
| September | 75% | 4.0 |
| October | 62% | 2.4 |
| November | 60% | 1.6 |
| December | 54% | 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 Willsboro need?
A normal year in Willsboro brings 7,301 heating degree days, 36% more than the median U.S. place (5,373), and 513 cooling degree days, 43% 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 2,445 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,398 | 0 |
| February | 1,222 | 0 |
| March | 1,063 | 0 |
| April | 634 | 2 |
| May | 287 | 20 |
| June | 73 | 99 |
| July | 9 | 190 |
| August | 24 | 153 |
| September | 150 | 47 |
| October | 486 | 2 |
| November | 798 | 0 |
| December | 1,156 | 0 |
| Year (annual) | 7,301 | 513 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00309495. 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.
How does Willsboro's climate compare?
Willsboro is warmer than 46 of the other 130 places with their own NOAA record in New York. Across the 7,247 U.S. stations with normals, its annual mean of 46.3°F is warmer than 25%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Willsboro share this climate record?
8 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.
- South Burlington, VT21,713 people · 11 mi E
- Shelburne, VT8,126 people · 8 mi E
- Willsboro Point, NY640 people · 2 mi N
- Hinesburg, VT4,742 people · 14 mi E
- Huntington, VT1,936 people · 20 mi E
- St. George, VT832 people · 12 mi E
- West Charlotte, VT187 people · 8 mi SE
- East Charlotte, VT135 people · 11 mi SE
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 Willsboro's climate
What is the coldest month in Willsboro?
January, with a normal high of 29°F and a normal low of 11°F. The warmest is July (80°F by day, 61°F at night).
Does it snow in Willsboro?
Yes. NOAA publishes no 1991-2020 snowfall normal for Willsboro's NOAA station; the nearest record that keeps one, Burlington (13 miles away), records 88 inches of snow in a normal year.
What plant hardiness zone is Willsboro in?
The USDA's 2023 map puts Willsboro in zone 5a in ZIP code 12996, the nearest ZIP area.
How late can frost come in Willsboro?
In half of years the last 32°F night comes after May 2; in one year in ten it comes after May 16. Waiting until May 16 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
- Burlington, VT13 miles from this station, 47.6°F a year
- Peru, NY16 miles from this station, 46.2°F a year
- Essex Junction, VT16 miles from this station, 46.4°F a year
- Vergennes, VT16 miles from this station, 46.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made