Jaffrey, New Hampshire climate: Normal weather by month, frost dates and records
Jaffrey's normal year runs from 13°F January nights to 81°F July afternoons, with 46.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.0°C, January lows of −10°C, July highs of 27°C, 1,179 mm of precipitation a year.
- NOAA stationJaffrey Municipal Airport
- Station IDUSW00054770
- Location42.80°N 72.00°W
- Elevation1,040 ft (317 m)
- Population (town)5,549
- Census place2,885
On October 14, the normal high in Jaffrey is 59°F and the normal low 39°F, and the chance of measurable rain or snow is 40%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jaffrey.
- Jan 31° 13°
- Feb 34° 14°
- Mar 42° 23°
- Apr 55° 33°
- May 67° 44°
- Jun 75° 54°
- Jul 81° 59°
- Aug 79° 57°
- Sep 71° 50°
- Oct 59° 39°
- Nov 47° 30°
- Dec 36° 20°
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 Jaffrey each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 13°F. The most precipitation falls in October (4.76 in), the least in February (2.98 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 31°F | 13°F | 22.3°F | 3.04 | 11 | <1 | 30 | 9 h 20 min |
| February | 34°F | 14°F | 24.3°F | 2.98 | 11 | <1 | 27 | 10 h 30 min |
| March | 42°F | 23°F | 32.3°F | 3.87 | 12 | <1 | 27 | 11 h 50 min |
| April | 55°F | 33°F | 44.2°F | 3.79 | 13 | <1 | 16 | 13 h 20 min |
| May | 67°F | 44°F | 55.5°F | 3.64 | 14 | <1 | 3 | 14 h 40 min |
| June | 75°F | 54°F | 64.6°F | 4.49 | 14 | 1 | <1 | 15 h 20 min |
| July | 81°F | 59°F | 69.8°F | 4.01 | 13 | 2 | <1 | 15 h |
| August | 79°F | 57°F | 68.1°F | 3.86 | 14 | 1 | <1 | 14 h |
| September | 71°F | 50°F | 60.3°F | 4.33 | 13 | <1 | 1 | 12 h 30 min |
| October | 59°F | 39°F | 48.8°F | 4.76 | 12 | <1 | 8 | 11 h 10 min |
| November | 47°F | 30°F | 38.2°F | 3.51 | 11 | <1 | 20 | 9 h 50 min |
| December | 36°F | 20°F | 28.4°F | 4.12 | 12 | <1 | 28 | 9 h |
| Year (annual) | 56°F | 36°F | 46.4°F | 46.40 | 151 | 4 | 159 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −10°C | −5.4°C | 77 mm |
| February | 1°C | −10°C | −4.3°C | 76 mm |
| March | 6°C | −5°C | 0.2°C | 98 mm |
| April | 13°C | 1°C | 6.8°C | 96 mm |
| May | 19°C | 7°C | 13.1°C | 92 mm |
| June | 24°C | 12°C | 18.1°C | 114 mm |
| July | 27°C | 15°C | 21.0°C | 102 mm |
| August | 26°C | 14°C | 20.1°C | 98 mm |
| September | 22°C | 10°C | 15.7°C | 110 mm |
| October | 15°C | 4°C | 9.3°C | 121 mm |
| November | 8°C | −1°C | 3.4°C | 89 mm |
| December | 2°C | −6°C | −2.0°C | 105 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Greenville (11 miles away), gets 75 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054770; 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 Jaffrey?
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 (13).
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 USW00054770.
When is the last frost in Jaffrey?
In Jaffrey, the last spring frost (32°F) comes after May 5 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 6 in half of years and before September 25 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 51 year in 10 after May 20; 9 in 10 after April 23
- First autumn frost, half of years before
- October 61 year in 10 before September 25; 9 in 10 before October 22
NOAA puts the median frost-free season at 152 days, and the season without a hard freeze (28°F) at 178 days.
A hard freeze (28°F) comes after April 23 in half of springs and before October 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jaffrey in zone 6a in ZIP code 03452, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Jaffrey's NOAA station is in zone 5b: the coldest night of a typical year reaches −12°F (21 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in New Hampshire · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00054770; 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 Jaffrey?
In a normal year in Jaffrey, 4 days a year reach 90°F, 159 nights fall to 32°F or colder and 151 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 159a normal year
- Days that stay below freezing
- 48high of 32°F or less
- Days with 0.01 inch of precipitation
- 151a normal year
The highest temperature in this station's record (since 1997) is 97°F, on June 24, 2025; the lowest is −22°F, on January 16, 2009.
The wettest calendar year on that record is 2018, with 57.98 in; the snowiest season is 1993–94, with 96.9 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00054770; records: ACIS (NOAA Regional Climate Centers), station USW00054770. Records use complete months only; a month missing more than three days is left out.
How sunny is Jaffrey?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Jaffrey, 3.8 kWh per square metre a day. August is the sunniest month (77%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.8 |
| February | 67% | 2.6 |
| March | 68% | 3.7 |
| April | 68% | 4.7 |
| May | 68% | 5.3 |
| June | 71% | 5.7 |
| July | 77% | 6.0 |
| August | 77% | 5.3 |
| September | 76% | 4.3 |
| October | 67% | 2.7 |
| November | 68% | 1.9 |
| December | 62% | 1.4 |
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 Jaffrey need?
A normal year in Jaffrey brings 7,172 heating degree days, 33% more than the median U.S. place (5,373), and 424 cooling degree days, 53% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,276 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,324 | 0 |
| February | 1,141 | 0 |
| March | 1,012 | 0 |
| April | 624 | 2 |
| May | 310 | 15 |
| June | 87 | 75 |
| July | 16 | 165 |
| August | 32 | 128 |
| September | 178 | 37 |
| October | 506 | 2 |
| November | 806 | 0 |
| December | 1,136 | 0 |
| Year (annual) | 7,172 | 424 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00054770. 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 Jaffrey been warmer than normal lately?
2023 averaged 49.9°F, 3.5°F above the 1991-2020 normal of 46.4°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.9°F | +2.5°F | 50.60 |
| 2022 | 48.5°F | +2.1°F | 42.49 |
| 2023 | 49.9°F | +3.5°F | 48.06 |
Source: observed years: ACIS, station USW00054770. A year counts only with all twelve months complete.
How does Jaffrey's climate compare?
Jaffrey is warmer than 16 of the other 27 places with their own NOAA record in New Hampshire, and wetter than 20. Across the 7,247 U.S. stations with normals, its annual mean of 46.4°F is warmer than 25%.
In the Köppen classification computed from these normals, Jaffrey 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 Jaffrey share this climate record?
Winchendon 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.
- Winchendon, MA10,587 people · 9 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Jaffrey's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Jaffrey. This page uses Jaffrey Municipal Airport; the other differs by site and elevation, and the linked ones have pages of their own:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Jaffrey Silver Ranch Airpark USC00274304 | in town | 1,030 ft | 47.0°F | 13°F | 83°F | 48.3 | – | May 5 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Jaffrey's climate
What is the coldest month in Jaffrey?
January, with a normal high of 31°F and a normal low of 13°F. The warmest is July (81°F by day, 59°F at night).
Does it snow in Jaffrey?
Yes. NOAA publishes no 1991-2020 snowfall normal for Jaffrey's NOAA station; the nearest record that keeps one, Greenville (11 miles away), records 75 inches of snow in a normal year.
What is the rainiest month in Jaffrey?
October, with 4.76 in of precipitation in a normal year; the driest is February with 2.98 in.
What plant hardiness zone is Jaffrey in?
The USDA's 2023 map puts Jaffrey in zone 6a in ZIP code 03452, the nearest ZIP area. By the same method at Jaffrey's NOAA station, the coldest night of a typical year reaches −12°F (21 years, 1991-2020): zone 5b.
How late can frost come in Jaffrey?
In half of years the last 32°F night comes after May 5; in one year in ten it comes after May 20. Waiting until May 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New Hampshire climateThe statewide normals and every place in the state
- Jaffrey Silver Ranch Airpark, NH0 miles from this station, 47.0°F a year
- Ashburnham N, MA11 miles from this station, 45.4°F a year
- Greenville, NH11 miles from this station, 45.7°F a year
- Birch Hill Dam, MA14 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