Mattapoisett has chilly, snowy winters and pleasant summers, with plenty of rain
A typical July afternoon reaches 82°, a January night drops to 23°, and about 33 inches of snow falls in a normal winter.
A year in Mattapoisett at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mattapoisett’s climate
Read from where Mattapoisett sits among Massachusetts’s towns. The page puts what stands out first.
Living with Mattapoisett’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
208 frost-free days. 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 5.
About 33" a winter over 10 days with an inch or more, most in January.
Months averaging under 55° run from October through April. Heating is 86% of the year’s heating-and-cooling load.
About 13 days a year reach 90°, and July afternoons average 82°.
The nicest months are May, June, July, August, September and October. 19 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →What a year in Mattapoisett feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
33 inches of snow, 50 of rain and melt
March is the wettest month and July the driest. Rain or snow falls on about 124 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 208 frost-free days a year
In half of years the last 32° night comes by April 11 and the first by November 5.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Mattapoisett and its neighbors
Rochester has the coldest January nights next door (21°) and Rochester the hottest July afternoons (83°). Tap a town to see its climate.
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 Mattapoisett averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.3°).
A bigger shift than in 93% of U.S. towns.
Change by month
How Mattapoisett compares
Against every U.S. town on TownTapestry, each counted once, with its place in Massachusetts.
Mattapoisett weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 39° | 23° | 4.1" | 10.9" | 11 | 22° – 38° |
| February | 41° | 24° | 3.6" | 8.5" | 11 | 20° – 38° |
| March | 47° | 30° | 5.4" | 6.6" | 12 | 32° – 45° |
| April | 57° | 38° | 4.4" | 1.7" | 12 | 43° – 52° |
| May | 67° | 48° | 3.5" | 0 | 11 | 52° – 61° |
| June | 76° | 57° | 3.8" | 0 | 10 | 63° – 70° |
| July | 82° | 64° | 3.2" | 0 | 8 | 69° – 77° |
| August | 81° | 63° | 3.7" | 0 | 9 | 69° – 76° |
| September | 74° | 56° | 4.2" | 0 | 10 | 62° – 68° |
| October | 63° | 46° | 4.9" | 0 | 8 | 51° – 60° |
| November | 53° | 36° | 4.4" | 0.4" | 10 | 40° – 49° |
| December | 44° | 28° | 4.9" | 4.4" | 12 | 30° – 47° |
| Year | 60° | 43° | 49.9" | 32.5" | 124 |
Heating and cooling a home in Mattapoisett
86% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 20° to 38°. June is the most reliable, staying within 6°.
Common questions about Mattapoisett’s climate
What is the coldest month in Mattapoisett?
January, with a typical high of 39° and a low of 23°.
What is the hottest month in Mattapoisett?
July, with a typical high of 82° and a low of 64°. About 13 days a year reach 90°.
How much snow does Mattapoisett get?
About 33 inches in a normal winter, most of it in January.
When is the first frost in Mattapoisett?
In half of years the first 32° night comes by November 5, and the last spring frost by April 11.
What is the rainiest month in Mattapoisett?
March, with 5.4 inches of rain and melted snow. The year totals 50 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mattapoisett.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mattapoisett itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at New Bedford Coop, MA (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.