Photo: John Phelan · CC BY-SA 3.0Seconsett Island has cooler summers than 91% of U.S. towns
The coldest hours of a January night bottom out at 24° on average. Precipitation is plentiful here, more than falls on 80% of U.S. towns. Decade by decade the climate has edged up, 2.0° above 1901–2000. From May to October, highs of 63–80° make it easy to spend the day outdoors.
A year in Seconsett Island at a glance
Each month’s typical high and low, and what it brings.
What stands out about Seconsett Island’s climate
Compared with towns across the U.S., with Seconsett Island’s place in Massachusetts beside it.
What a year in Seconsett Island feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 213 frost-free days a year
In half of years the last 32° night comes by April 11 and the first by November 11. Frost and day counts come from NOAA’s station at Woods Hole Golf Club, MA, 8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Seconsett Island’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 4°. 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 25 inches of snow a winter
Snow, measured at Edgartown, MA, is heaviest from January through February, about 8 inches a month. Precipitation (rain plus melted snow) adds up to 49 inches a year; March is the wettest month and July the driest. Rain or snow falls on about 128 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Seconsett Island
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 Woods Hole Golf Club, MA.
Living with Seconsett Island’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
213 frost-free days in zone 7a. The last frost comes by Apr 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 11.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Seconsett Island from natural hazards, river flooding is the largest share (49%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Seconsett Island and its neighbors
Every town next door is within a degree of Seconsett Island in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Seconsett Island’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 |
|---|---|---|---|---|
| Seconsett Island, MA | 24° | 80° | 49" | 25" |
| Galax, VA | 25° | 82° | 48" | 17" |
| Islip, NY | 26° | 83° | 45" | 32" |
| Lake Hopatcong, NJ | 18° | 82° | 50" | 28" |
| Shamokin, PA | 19° | 82° | 46" | 34" |
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 Seconsett Island averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.4°).
A bigger shift than in 88% 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 Seconsett Island compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Seconsett Island’s place among Massachusetts’.
Seconsett Island weather by month
Highs, lows and precipitation from NOAA’s grid at Seconsett Island’s center; snow, wet days and snow on the ground from Edgartown, MA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 39° | 24° | 4.0" | 8.8" | 12 | 6 | 22° – 38° |
| February | 40° | 25° | 3.6" | 8.1" | 10 | 7 | 22° – 38° |
| March | 46° | 30° | 5.0" | 4.7" | 11 | 3 | 33° – 44° |
| April | 55° | 38° | 4.3" | 0.3" | 12 | 0 | 43° – 51° |
| May | 65° | 48° | 3.5" | 0.0" | 12 | 0 | 51° – 60° |
| June | 74° | 57° | 3.5" | 0.0" | 10 | 0 | 62° – 69° |
| July | 80° | 64° | 2.9" | 0.0" | 8 | 0 | 68° – 76° |
| August | 79° | 63° | 3.6" | 0.0" | 9 | 0 | 68° – 75° |
| September | 73° | 56° | 4.2" | 0.0" | 9 | 0 | 62° – 68° |
| October | 63° | 47° | 4.9" | 0.0" | 11 | 0 | 51° – 60° |
| November | 53° | 38° | 4.4" | 0.0" | 11 | 0 | 41° – 50° |
| December | 45° | 30° | 4.9" | 3.4" | 12 | 3 | 31° – 47° |
| Year | 59° | 43° | 48.8" | 25.3" | 128 | 20 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 22° to 38°. June is the most reliable, staying within 7°.
Where Seconsett Island’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 Seconsett Island’s center.
- Snow: Edgartown, MA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Woods Hole Golf Club, MA, 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 Seconsett Island’s climate
What is the weather like in Seconsett Island?
A typical July afternoon reaches 80°, a January night drops to 24°, and about 25 inches of snow falls in a normal winter. Milder January nights than 60% of U.S. towns; cooler July afternoons than 91% of U.S. towns.
How cold does it get in Seconsett Island in winter?
January nights average 24°. About 83 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Seconsett Island get?
About 25 inches in a normal winter at Edgartown, MA, heaviest from January through February, about 8 inches a month, with snow on the ground about 20 days a year.
How hot does it get in Seconsett Island?
July, with a typical high of 80° and a low of 64°. About 1 days a year reach 90° (Woods Hole Golf Club, MA).
When is the first and last frost in Seconsett Island?
In half of years the last spring frost (32°) comes by April 11 and the first fall frost by November 11, about 213 frost-free days, at Woods Hole Golf Club, MA.
What growing zone is Seconsett Island in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 4°.
What is the best time of year to visit Seconsett Island?
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 Seconsett Island getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 88% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Seconsett Island.
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.