Photo: John Phelan · CC BY-SA 3.0Monson’s winters are colder and snowier than most of the U.S.
A typical July afternoon reaches 82°, a January night drops to 16°, and about 43 inches of snow falls in a normal winter.
A year in Monson at a glance
Each month’s typical high and low, and what it brings.
What stands out about Monson’s climate
Compared with towns across the U.S., with Monson’s place in Massachusetts beside it.
What a year in Monson feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 169 frost-free days a year
In half of years the last 32° night comes by April 28 and the first by October 15. Frost and day counts come from NOAA’s station at E Brimfield Lake, MA, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Monson’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. 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 43 inches of snow a winter
Snow, measured at Ware, MA, is heaviest from January through February, about 12 inches a month. Precipitation (rain plus melted snow) adds up to 48 inches a year; October is the wettest month and February 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 Monson
93% 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 E Brimfield Lake, MA.
Living with Monson’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
169 frost-free days in zone 6a. The last frost comes by Apr 28 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 15.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 20 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Monson from natural hazards, river flooding is the largest share (71%); heat waves, cold waves, winter storms and ice storms together are 8%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Monson and its neighbors
Hampden the hottest July afternoons (84°, 2° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Monson’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 |
|---|---|---|---|---|
| Monson, MA | 16° | 82° | 48" | 43" |
| Carbondale, PA | 16° | 81° | 46" | 47" |
| Greene, NY | 15° | 82° | 44" | 48" |
| Ontario, OH | 17° | 82° | 42" | 49" |
| Hackettstown, NJ | 19° | 84° | 51" | 30" |
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 Monson averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.5°).
A bigger shift than in 75% 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 Monson compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Monson’s place among Massachusetts’.
Monson weather by month
Highs, lows and precipitation from NOAA’s grid at Monson’s center; snow, wet days and snow on the ground from Ware, MA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 35° | 16° | 3.5" | 11.5" | 11 | 20 | 16° – 32° |
| February | 37° | 18° | 3.1" | 12.0" | 9 | 19 | 14° – 35° |
| March | 46° | 26° | 4.0" | 8.7" | 11 | 12 | 29° – 45° |
| April | 58° | 35° | 3.9" | 0.8" | 11 | 1 | 42° – 51° |
| May | 69° | 45° | 3.6" | 0.0" | 13 | 0 | 52° – 62° |
| June | 77° | 55° | 4.5" | 0.0" | 12 | 0 | 63° – 69° |
| July | 82° | 60° | 4.1" | 0.0" | 11 | 0 | 67° – 75° |
| August | 81° | 59° | 4.5" | 0.0" | 10 | 0 | 66° – 74° |
| September | 73° | 51° | 4.3" | 0.0" | 9 | 0 | 59° – 66° |
| October | 62° | 40° | 4.8" | 0.0" | 10 | 0 | 46° – 58° |
| November | 50° | 31° | 3.7" | 0.7" | 10 | 1 | 36° – 45° |
| December | 39° | 23° | 4.3" | 9.3" | 11 | 12 | 24° – 41° |
| Year | 59° | 38° | 48.1" | 43.0" | 128 | 64 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 14° to 35°. June is the most reliable, staying within 6°.
Where Monson’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 Monson’s center.
- Snow: Ware, MA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: E Brimfield Lake, MA, 10 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 Monson’s climate
What is the weather like in Monson?
A typical July afternoon reaches 82°, a January night drops to 16°, and about 43 inches of snow falls in a normal winter. Colder January nights than 79% of U.S. towns; cooler July afternoons than 79% of U.S. towns.
How cold does it get in Monson in winter?
January nights average 16°. About 150 nights a year reach 32° or below and 9 reach 0° or below. In the coldest January of the last 30 years the month averaged 16°.
How much snow does Monson get?
About 43 inches in a normal winter at Ware, MA, heaviest from January through February, about 12 inches a month, with snow on the ground about 64 days a year.
How hot does it get in Monson?
July, with a typical high of 82° and a low of 60°. About 5 days a year reach 90° (E Brimfield Lake, MA).
When is the first and last frost in Monson?
In half of years the last spring frost (32°) comes by April 28 and the first fall frost by October 15, about 169 frost-free days, at E Brimfield Lake, MA.
What growing zone is Monson in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Monson?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Monson getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Monson.
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.