Lunenburg has chilly, snowy winters and pleasant summers
A typical July afternoon reaches 83°, a January night drops to 15°, and about 75 inches of snow falls in a normal winter.
A year in Lunenburg at a glance
Each month’s typical high and low, and what it brings.
What stands out about Lunenburg’s climate
Read from where Lunenburg sits among Massachusetts’s towns. The page puts what stands out first.
75 inches of snow, 47 of rain and melt
October is the wettest month and February the driest. Rain or snow falls on about 137 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
What a year in Lunenburg 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 29 and the first by October 11.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Lunenburg’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
164 frost-free days. The last frost comes by Apr 29 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.
About 75" a winter over 19 days with an inch or more, most in February. Snow covers the ground about 91 days a year.
Months averaging under 55° run from October through April. Heating is 91% of the year’s heating-and-cooling load.
About 15 days a year reach 90°, and July afternoons average 83°.
The nicest months are May, June, July, August and September. 63 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 →Lunenburg and its neighbors
Ashby has the coldest January nights next door (14°) and Shirley the hottest July afternoons (84°). 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 Lunenburg averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.2°).
A bigger shift than in 85% of U.S. towns.
Change by month
How Lunenburg compares
Against every U.S. town on TownTapestry, each counted once, with its place in Massachusetts.
Lunenburg 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 15° | 3.4" | 16.9" | 13 | 24 | 15° – 32° |
| February | 37° | 17° | 3.3" | 18.9" | 11 | 24 | 13° – 33° |
| March | 45° | 25° | 4.1" | 16.4" | 13 | 20 | 29° – 44° |
| April | 58° | 35° | 4.3" | 4.0" | 12 | 4 | 43° – 51° |
| May | 70° | 46° | 3.7" | 0.1" | 13 | 0 | 52° – 63° |
| June | 78° | 55° | 4.2" | 0 | 12 | 0 | 63° – 69° |
| July | 83° | 61° | 3.7" | 0 | 11 | 0 | 67° – 76° |
| August | 81° | 59° | 3.7" | 0 | 10 | 0 | 67° – 74° |
| September | 74° | 51° | 4.1" | 0 | 9 | 0 | 59° – 67° |
| October | 62° | 39° | 4.8" | 0.3" | 11 | 0 | 46° – 57° |
| November | 50° | 30° | 3.9" | 3.0" | 11 | 3 | 35° – 45° |
| December | 39° | 22° | 4.3" | 15.6" | 13 | 17 | 24° – 40° |
| Year | 59° | 38° | 47.4" | 75.2" | 137 | 91 |
Heating and cooling a home in Lunenburg
91% 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 13° to 33°. June is the most reliable, staying within 6°.
Common questions about Lunenburg’s climate
What is the coldest month in Lunenburg?
January, with a typical high of 34° and a low of 15°.
What is the hottest month in Lunenburg?
July, with a typical high of 83° and a low of 61°. About 15 days a year reach 90°.
How much snow does Lunenburg get?
About 75 inches in a normal winter, most of it in February.
When is the first frost in Lunenburg?
In half of years the first 32° night comes by October 11, and the last spring frost by April 29.
What is the rainiest month in Lunenburg?
October, with 4.8 inches of rain and melted snow. The year totals 47 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Lunenburg.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Lunenburg itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ashburnham, MA (10 mi, snow) and Fitchburg Municipal Airport, MA (3 mi, frost, heat and degree days). 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.