South Ashburnham has cold, snowy winters and pleasant summers, with plenty of rain
A typical July afternoon reaches 80°, a January night drops to 14°, and about 75 inches of snow falls in a normal winter.
A year in South Ashburnham at a glance
Each month’s typical high and low, and what it brings.
What stands out about South Ashburnham’s climate
Read from where South Ashburnham sits among Massachusetts’s towns. The page puts what stands out first.
75 inches of snow, 49 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
About 163 frost-free days a year
In half of years the last 32° night comes by May 2 and the first by October 13.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
What a year in South Ashburnham feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Living with South Ashburnham’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
163 frost-free days. The last frost comes by May 2 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 13.
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 95% of the year’s heating-and-cooling load.
About 3 days a year reach 90°, and July afternoons average 80°.
The nicest months are May, June, July, August and September. 1.7 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 →South Ashburnham and its neighbors
Ashburnham has the coldest January nights next door (14°) and Ashburnham the hottest July afternoons (80°). 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 South Ashburnham averaged 1.9° 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
How South Ashburnham compares
Against every U.S. town on TownTapestry, each counted once, with its place in Massachusetts.
South Ashburnham 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 | 32° | 14° | 3.6" | 16.9" | 13 | 24 | 13° – 30° |
| February | 35° | 16° | 3.3" | 18.9" | 11 | 24 | 11° – 32° |
| March | 43° | 23° | 4.2" | 16.4" | 13 | 20 | 26° – 42° |
| April | 56° | 33° | 4.2" | 4.0" | 12 | 4 | 41° – 49° |
| May | 67° | 44° | 3.9" | 0.1" | 13 | 0 | 50° – 61° |
| June | 75° | 53° | 4.4" | 0 | 12 | 0 | 61° – 67° |
| July | 80° | 59° | 4.0" | 0 | 11 | 0 | 65° – 73° |
| August | 78° | 57° | 4.1" | 0 | 10 | 0 | 64° – 72° |
| September | 71° | 49° | 4.3" | 0 | 9 | 0 | 57° – 64° |
| October | 59° | 38° | 5.1" | 0.3" | 11 | 0 | 44° – 56° |
| November | 47° | 29° | 3.9" | 3.0" | 11 | 3 | 34° – 43° |
| December | 37° | 20° | 4.3" | 15.6" | 13 | 17 | 22° – 39° |
| Year | 57° | 36° | 49.3" | 75.2" | 137 | 91 |
Heating and cooling a home in South Ashburnham
95% 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 11° to 32°. June is the most reliable, staying within 6°.
Common questions about South Ashburnham’s climate
What is the coldest month in South Ashburnham?
January, with a typical high of 32° and a low of 14°.
What is the hottest month in South Ashburnham?
July, with a typical high of 80° and a low of 59°. About 3 days a year reach 90°.
How much snow does South Ashburnham get?
About 75 inches in a normal winter, most of it in February.
When is the first frost in South Ashburnham?
In half of years the first 32° night comes by October 13, and the last spring frost by May 2.
What is the rainiest month in South Ashburnham?
October, with 5.1 inches of rain and melted snow. The year totals 49 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in South Ashburnham.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Ashburnham itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ashburnham, MA (1 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.