Photo: TrustTruth at en.wikipedia · Public domainAfternoon heat in Jaffrey trails that of 92% of U.S. towns
January nights here settle around 13°. Only 67° separates winter nights from summer afternoons. Winter nights are cold: in January they are colder than in 90% of U.S. towns. Garden chairs stay out from May to September, the months with highs of 67–80°.
A year in Jaffrey at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jaffrey’s climate
Compared with towns across the U.S., with Jaffrey’s place in New Hampshire beside it.
What a year in Jaffrey feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 152 frost-free days a year
In half of years the last 32° night comes by May 5 and the first by October 6. Day counts come from NOAA’s station at Jaffrey Silver Rch Airpark, NH, 3 miles from the town’s center, 110 ft lower; frost dates and degree days from Jaffrey Muni Airport, 3 miles away.
The 2023 USDA map puts Jaffrey’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −10°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 73 inches of snow a winter
Snow, measured at Fitzwilliam 2 W, NH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 47 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 104 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Jaffrey
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Jaffrey Muni Airport.
Living with Jaffrey’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
152 frost-free days in zone 6a. The last frost comes by May 5 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 6.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 69 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Jaffrey from natural hazards, river flooding is the largest share (65%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jaffrey and its neighbors
Dublin has the coldest January nights next door (12°, 1° colder). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Jaffrey’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Jaffrey, NH | 13° | 80° | 47" | 73" |
| Walton, NY | 13° | 80° | 47" | 71" |
| Ellsworth, ME | 11° | 79° | 48" | 75" |
| Bradford, PA | 15° | 80° | 44" | 75" |
| Swanton, VT | 9° | 80° | 40" | 80" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Jaffrey averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.7°).
A bigger shift than in 89% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Jaffrey compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jaffrey’s place among New Hampshire’s.
Jaffrey weather by month
Highs, lows and precipitation from NOAA’s grid at Jaffrey’s center; snow, wet days and snow on the ground from Fitzwilliam 2 W, NH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 13° | 3.3" | 22.3" | 10 | 25 | 11° – 29° |
| February | 34° | 14° | 3.1" | 16.1" | 7 | 24 | 10° – 31° |
| March | 42° | 22° | 3.6" | 16.3" | 8 | 21 | 25° – 42° |
| April | 55° | 32° | 3.7" | 2.4" | 7 | 4 | 40° – 48° |
| May | 67° | 43° | 3.7" | 0.1" | 10 | 0 | 50° – 60° |
| June | 75° | 52° | 4.5" | 0.0" | 10 | 0 | 61° – 68° |
| July | 80° | 57° | 4.3" | 0.0" | 9 | 0 | 64° – 73° |
| August | 78° | 56° | 4.2" | 0.0" | 8 | 0 | 64° – 71° |
| September | 71° | 48° | 4.2" | 0.0" | 8 | 0 | 55° – 63° |
| October | 59° | 38° | 4.9" | 0.2" | 9 | 0 | 43° – 55° |
| November | 47° | 29° | 3.6" | 1.8" | 8 | 3 | 34° – 43° |
| December | 36° | 19° | 4.1" | 13.3" | 9 | 17 | 21° – 38° |
| Year | 56° | 35° | 47.2" | 72.5" | 104 | 94 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 10° to 31°. June is the most reliable, staying within 7°.
Where Jaffrey’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Jaffrey’s center.
- Snow: Fitzwilliam 2 W, NH.
- Frost dates, heating and cooling: Jaffrey Muni Airport, 3 miles away.
- Freezing nights, 90° and 100° days: Jaffrey Silver Rch Airpark, NH, 3 miles from the town’s center, 110 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Jaffrey’s climate
What is the weather like in Jaffrey?
A typical July afternoon reaches 80°, a January night drops to 13°, and about 73 inches of snow falls in a normal winter. Colder January nights than 90% of U.S. towns; cooler July afternoons than 92% of U.S. towns.
How cold does it get in Jaffrey in winter?
January nights average 13°. About 150 nights a year reach 32° or below and 10 reach 0° or below. In the coldest January of the last 30 years the month averaged 11°.
How much snow does Jaffrey get?
About 73 inches in a normal winter at Fitzwilliam 2 W, NH, most of it in January, with snow on the ground about 94 days a year.
How hot does it get in Jaffrey?
July, with a typical high of 80° and a low of 57°. About 9 days a year reach 90° (Jaffrey Muni Airport).
When is the first and last frost in Jaffrey?
In half of years the last spring frost (32°) comes by May 5 and the first fall frost by October 6, about 152 frost-free days, at Jaffrey Muni Airport.
What growing zone is Jaffrey in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −10°.
What is the best time of year to visit Jaffrey?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Jaffrey getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 89% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jaffrey.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.