Photo: Quintin Soloviev · CC BY 4.0Nights turn raw in Manchester each January, colder than in 87% of U.S. towns
On a normal July day the thermometer tops out near 83°. Winter and summer sit 69° apart. By July afternoons alone, it runs cooler than 69% of U.S. towns. From May to September, highs of 69–83° make it easy to spend the day outdoors.
A year in Manchester at a glance
Each month’s typical high and low, and what it brings.
What stands out about Manchester’s climate
Compared with towns across the U.S., with Manchester’s place in New Hampshire beside it.
What a year in Manchester feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 164 frost-free days a year
In half of years the last 32° night comes by April 30 and the first by October 11. Day counts come from NOAA’s station at Manchester Airport, 4 miles from the city’s center point, at about the same height; frost dates and degree days from Massabesic Lake, NH, 2.6 miles away.
The 2023 USDA map puts Manchester’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −9°. 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 53 inches of snow a winter
Snow, measured at Massabesic Lake, NH, is heaviest from January through February, about 17 inches a month. Precipitation (rain plus melted snow) adds up to 44 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 111 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Manchester
93% 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 Massabesic Lake, NH.
Living with Manchester’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
164 frost-free days in zone 6a. The last frost comes by Apr 30 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 11.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 35 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Manchester from natural hazards, river flooding is the largest share (61%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Manchester and its neighbors
Every town next door is within a degree of Manchester in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Manchester’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 |
|---|---|---|---|---|
| Manchester, NH | 14° | 83° | 44" | 53" |
| Greene, NY | 15° | 82° | 44" | 48" |
| Archbald, PA | 17° | 82° | 44" | 45" |
| Ontario, OH | 17° | 82° | 42" | 49" |
| Plymouth, IN | 17° | 83° | 40" | 55" |
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 Manchester averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.5°).
A bigger shift than in 79% 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. In a city of 117,000 people, part of the change is the city itself: pavement and buildings hold heat (the urban heat island).
How Manchester compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Manchester’s place among New Hampshire’s.
Manchester weather by month
Highs, lows and precipitation from NOAA’s grid at Manchester’s center; snow, wet days and snow on the ground from Massabesic Lake, NH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 14° | 3.0" | 15.9" | 9 | 25 | 13° – 31° |
| February | 36° | 16° | 2.9" | 17.6" | 7 | 20 | 13° – 32° |
| March | 45° | 24° | 3.7" | 6.7" | 8 | 14 | 27° – 43° |
| April | 58° | 34° | 3.7" | 0.9" | 10 | 1 | 42° – 50° |
| May | 69° | 45° | 3.5" | 0.0" | 11 | 0 | 51° – 62° |
| June | 78° | 54° | 4.1" | 0.0" | 11 | 0 | 63° – 69° |
| July | 83° | 60° | 3.7" | 0.0" | 10 | 0 | 67° – 75° |
| August | 81° | 58° | 3.5" | 0.0" | 9 | 0 | 67° – 73° |
| September | 74° | 50° | 4.0" | 0.0" | 9 | 0 | 58° – 67° |
| October | 61° | 39° | 4.5" | 0.0" | 10 | 0 | 46° – 57° |
| November | 49° | 30° | 3.6" | 1.1" | 9 | 1 | 35° – 44° |
| December | 38° | 21° | 3.9" | 10.6" | 9 | 10 | 24° – 39° |
| Year | 59° | 37° | 44.1" | 52.8" | 111 | 71 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 13° to 32°. August is the most reliable, staying within 6°.
Where Manchester’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 Manchester’s center.
- Snow: Massabesic Lake, NH.
- Frost dates, heating and cooling: Massabesic Lake, NH, 2.6 miles away.
- Freezing nights, 90° and 100° days: Manchester Airport, 4 miles from the city’s center point, at about the same height; 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 Manchester’s climate
What is the weather like in Manchester?
A typical July afternoon reaches 83°, a January night drops to 14°, and about 53 inches of snow falls in a normal winter. Colder January nights than 87% of U.S. towns; cooler July afternoons than 69% of U.S. towns.
How cold does it get in Manchester in winter?
January nights average 14°. About 129 nights a year reach 32° or below and 4 reach 0° or below. In the coldest January of the last 30 years the month averaged 13°.
How much snow does Manchester get?
About 53 inches in a normal winter at Massabesic Lake, NH, heaviest from January through February, about 17 inches a month, with snow on the ground about 71 days a year.
How hot does it get in Manchester?
July, with a typical high of 83° and a low of 60°. About 16 days a year reach 90° (Massabesic Lake, NH).
When is the first and last frost in Manchester?
In half of years the last spring frost (32°) comes by April 30 and the first fall frost by October 11, about 164 frost-free days, at Massabesic Lake, NH.
What growing zone is Manchester in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −9°.
What is the best time of year to visit Manchester?
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 Manchester getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 79% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Manchester.
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.