Photo: T.S. Custadio aka ToddC4176 at en.wikipedia · CC BY-SA 3.0Afternoon heat in Yarmouth trails that of 95% of U.S. towns
On a normal January night the air cools to about 24°. By precipitation alone, it ranks wetter than 63% of U.S. towns. Decade by decade the climate has edged up, 2.1° above 1901–2000. From May to October, highs of 62–79° make it easy to spend the day outdoors.
A year in Yarmouth at a glance
Each month’s typical high and low, and what it brings.
What stands out about Yarmouth’s climate
Compared with towns across the U.S., with Yarmouth’s place in Massachusetts beside it.
What a year in Yarmouth feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 188 frost-free days a year
In half of years the last 32° night comes by April 22 and the first by October 28. Frost and day counts come from NOAA’s station at Hyannis Barnstable Muni Airport, 2.8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Yarmouth’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 5°. 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 22 inches of snow a winter
Snow, measured at Hyannis, MA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 46 inches a year; December is the wettest month and July the driest. Rain or snow falls on about 113 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Yarmouth
90% 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 Hyannis Barnstable Muni Airport.
Living with Yarmouth’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
188 frost-free days in zone 7a. The last frost comes by Apr 22 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 28.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 104 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Yarmouth from natural hazards, river flooding is the largest share (59%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Yarmouth and its neighbors
Every town next door is within a degree of Yarmouth in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Yarmouth’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 |
|---|---|---|---|---|
| Yarmouth, MA | 24° | 79° | 46" | 22" |
| Galax, VA | 25° | 82° | 48" | 17" |
| Princeton, WV | 23° | 82° | 41" | 24" |
| North Bellport, NY | 25° | 82° | 46" | 32" |
| Atlantic City, NJ | 28° | 83° | 45" | 17" |
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 Yarmouth averaged 2.1° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 92% 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 Yarmouth compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Yarmouth’s place among Massachusetts’.
Yarmouth weather by month
Highs, lows and precipitation from NOAA’s grid at Yarmouth’s center; snow, wet days and snow on the ground from Hyannis, MA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 39° | 24° | 3.9" | 9.5" | 10 | 5 | 22° – 38° |
| February | 40° | 25° | 3.3" | 6.3" | 10 | 7 | 23° – 38° |
| March | 45° | 30° | 4.5" | 3.6" | 10 | 3 | 32° – 43° |
| April | 54° | 38° | 4.1" | 0.0" | 11 | 0 | 42° – 50° |
| May | 64° | 47° | 3.2" | 0.0" | 10 | 0 | 50° – 59° |
| June | 72° | 57° | 3.4" | 0.0" | 9 | 0 | 61° – 68° |
| July | 79° | 63° | 2.6" | 0.0" | 7 | 0 | 67° – 75° |
| August | 78° | 63° | 3.4" | 0.0" | 8 | 0 | 67° – 74° |
| September | 72° | 56° | 3.9" | 0.0" | 8 | 0 | 61° – 68° |
| October | 62° | 46° | 4.5" | 0.0" | 10 | 0 | 51° – 60° |
| November | 53° | 38° | 4.1" | 0.0" | 10 | 0 | 41° – 49° |
| December | 44° | 30° | 4.7" | 2.1" | 12 | 2 | 31° – 46° |
| Year | 59° | 43° | 45.6" | 21.5" | 113 | 16 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 22° to 38°. September is the most reliable, staying within 7°.
Where Yarmouth’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 Yarmouth’s center.
- Snow: Hyannis, MA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Hyannis Barnstable Muni Airport, 2.8 miles from the town’s center, 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 Yarmouth’s climate
What is the weather like in Yarmouth?
A typical July afternoon reaches 79°, a January night drops to 24°, and about 22 inches of snow falls in a normal winter. Milder January nights than 61% of U.S. towns; cooler July afternoons than 95% of U.S. towns.
How cold does it get in Yarmouth in winter?
January nights average 24°. About 109 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Yarmouth get?
About 22 inches in a normal winter at Hyannis, MA, most of it in January, with snow on the ground about 16 days a year.
How hot does it get in Yarmouth?
July, with a typical high of 79° and a low of 63°. About 2 days a year reach 90° (Hyannis Barnstable Muni Airport).
When is the first and last frost in Yarmouth?
In half of years the last spring frost (32°) comes by April 22 and the first fall frost by October 28, about 188 frost-free days, at Hyannis Barnstable Muni Airport.
What growing zone is Yarmouth in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 5°.
What is the best time of year to visit Yarmouth?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Yarmouth getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Yarmouth.
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.