Grafton, New York climate: Climate normals at a NOAA weather station
Grafton's normal year runs from 14°F January nights to 78°F July afternoons, with 47.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.8°C, January lows of −10°C, July highs of 25°C, 1,197 mm of precipitation a year.
- NOAA stationGrafton
- Station IDUSC00303360
- Location42.78°N 73.47°W
- Elevation1,560 ft (476 m)
On October 23, the normal high in Grafton is 55°F and the normal low 38°F, and the chance of measurable rain or snow is 37%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grafton.
- Jan 30° 14°
- Feb 32° 16°
- Mar 41° 23°
- Apr 55° 35°
- May 67° 46°
- Jun 74° 54°
- Jul 78° 59°
- Aug 77° 58°
- Sep 69° 51°
- Oct 58° 41°
- Nov 45° 30°
- Dec 34° 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 at Grafton each month?
July is the warmest month, with normal highs of 78°F; January the coldest, with normal lows of 14°F. The most precipitation falls in October (4.71 in), the least in February (2.62 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 30°F | 14°F | 22.2°F | 2.96 | 13 | <1 | 29 | 9 h 20 min |
| February | 32°F | 16°F | 24.0°F | 2.62 | 11 | <1 | 26 | 10 h 30 min |
| March | 41°F | 23°F | 32.0°F | 3.69 | 14 | <1 | 26 | 11 h 50 min |
| April | 55°F | 35°F | 45.0°F | 4.42 | 12 | <1 | 14 | 13 h 20 min |
| May | 67°F | 46°F | 56.3°F | 4.39 | 15 | <1 | 1 | 14 h 40 min |
| June | 74°F | 54°F | 64.0°F | 4.48 | 11 | <1 | <1 | 15 h 20 min |
| July | 78°F | 59°F | 68.4°F | 4.29 | 12 | <1 | <1 | 15 h |
| August | 77°F | 58°F | 67.4°F | 3.99 | 11 | <1 | <1 | 14 h |
| September | 69°F | 51°F | 59.9°F | 4.24 | 11 | <1 | <1 | 12 h 30 min |
| October | 58°F | 41°F | 49.0°F | 4.71 | 11 | <1 | 7 | 11 h 10 min |
| November | 45°F | 30°F | 37.7°F | 3.51 | 13 | <1 | 19 | 9 h 50 min |
| December | 34°F | 21°F | 27.5°F | 3.84 | 13 | <1 | 28 | 9 h |
| Year (annual) | 55°F | 37°F | 46.1°F | 47.14 | 148 | 1 | 152 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −1°C | −10°C | −5.4°C | 75 mm |
| February | 0°C | −9°C | −4.4°C | 67 mm |
| March | 5°C | −5°C | 0.0°C | 94 mm |
| April | 13°C | 2°C | 7.2°C | 112 mm |
| May | 19°C | 8°C | 13.5°C | 112 mm |
| June | 23°C | 12°C | 17.8°C | 114 mm |
| July | 25°C | 15°C | 20.2°C | 109 mm |
| August | 25°C | 15°C | 19.7°C | 101 mm |
| September | 21°C | 10°C | 15.5°C | 108 mm |
| October | 14°C | 5°C | 9.4°C | 120 mm |
| November | 7°C | −1°C | 3.2°C | 89 mm |
| December | 1°C | −6°C | −2.5°C | 98 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Albany (18 miles away), gets 59 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00303360; 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.
Which months are mildest at Grafton?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (11).
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 USC00303360.
When is the last frost at Grafton?
In Grafton, the last spring frost (32°F) comes after May 1 in half of years and after May 15 in one year in ten; the first autumn frost comes before October 11 in half of years and before September 28 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 11 year in 10 after May 15; 9 in 10 after April 18
- First autumn frost, half of years before
- October 111 year in 10 before September 28; 9 in 10 before October 27
NOAA puts the median frost-free season at 162 days, and the season without a hard freeze (28°F) at 187 days.
A hard freeze (28°F) comes after April 18 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grafton in zone 5b in ZIP code 12082, 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 USC00303360; 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 at Grafton?
In a normal year in Grafton, 1 day a year reaches 90°F, 152 nights fall to 32°F or colder and 148 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 152a normal year
- Days that stay below freezing
- 61high of 32°F or less
- Days with 0.01 inch of precipitation
- 148a normal year
The highest temperature in this station's record (since 1950) is 95°F, on September 3, 1953; the lowest is −27°F, on January 9, 1968.
The wettest calendar year on that record is 1975, with 59.28 in; the snowiest season is 2002–03, with 138.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00303360; records: ACIS (NOAA Regional Climate Centers), station USC00303360. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Grafton?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Grafton, 3.7 kWh per square metre a day. July is the sunniest month (77%) and December the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 1.6 |
| February | 64% | 2.5 |
| March | 66% | 3.6 |
| April | 67% | 4.6 |
| May | 68% | 5.3 |
| June | 71% | 5.8 |
| July | 77% | 6.0 |
| August | 77% | 5.3 |
| September | 76% | 4.3 |
| October | 65% | 2.7 |
| November | 65% | 1.8 |
| December | 57% | 1.3 |
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 many heating and cooling degree days does Grafton record?
A normal year at Grafton brings 7,197 heating degree days, 34% more than the median U.S. place (5,373), and 348 cooling degree days, 62% 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 2,235 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,328 | 0 |
| February | 1,148 | 0 |
| March | 1,025 | 0 |
| April | 604 | 4 |
| May | 288 | 17 |
| June | 90 | 61 |
| July | 20 | 127 |
| August | 34 | 109 |
| September | 182 | 28 |
| October | 496 | 1 |
| November | 819 | 0 |
| December | 1,164 | 0 |
| Year (annual) | 7,197 | 348 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00303360. 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 Grafton's climate compare?
Grafton is warmer than 44 of the 131 places with their own NOAA record in New York, and wetter than 86. Across the 7,247 U.S. stations with normals, its annual mean of 46.1°F is warmer than 24%.
In the Köppen classification computed from these normals, Grafton 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 Grafton share this climate record?
Poestenkill has no NOAA station with 1991-2020 normals of its 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.
- Poestenkill, NY828 people · 8 mi SW
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 Grafton's climate
What is the coldest month at Grafton?
January, with a normal high of 30°F and a normal low of 14°F. The warmest is July (78°F by day, 59°F at night).
Does it snow at Grafton?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Albany (18 miles away), records 59 inches of snow in a normal year.
What is the rainiest month at Grafton?
October, with 4.71 in of precipitation in a normal year; the driest is February with 2.62 in.
What plant hardiness zone is Grafton in?
The USDA's 2023 map puts Grafton in zone 5b in ZIP code 12082, the nearest ZIP area.
How late can frost come at Grafton?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 15. Waiting until May 15 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
- Buskirk, NY11 miles from this station, 46.9°F a year
- Troy, NY11 miles from this station, 50.9°F a year
- Pownal, VT12 miles from this station, 45.9°F a year
- Bennington, VT14 miles from this station, 46.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made