Photo: The original uploader was Mickmaguire at English Wikipedia. · CC BY-SA 2.0Williamstown gets about 124 inches of snow a winter, more than all but 129 U.S. towns
A typical July afternoon reaches 78°, a January night drops to 7°, and about 124 inches of snow falls in a normal winter.
A year in Williamstown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Williamstown’s climate
Compared with towns across the U.S., with Williamstown’s place in Vermont beside it.
What a year in Williamstown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 136 frost-free days a year
In half of years the last 32° night comes by May 16 and the first by September 29. Frost and day counts come from NOAA’s station at Barre Montpelier Airport, 7 miles from the town’s center, 350 ft lower.
The 2023 USDA map puts Williamstown’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −20°. 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 124 inches of snow a winter
Snow, measured at Brookfield 2 Sw, VT, falls mostly in January, February, March and December. Precipitation (rain plus melted snow) adds up to 44 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 149 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Williamstown
97% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Barre Montpelier Airport.
Living with Williamstown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
136 frost-free days in zone 4b. The last frost comes by May 16 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 29.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 14 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Williamstown from natural hazards, river flooding is the largest share (71%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Williamstown and its neighbors
Every town next door is within a degree of Williamstown in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Williamstown’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 |
|---|---|---|---|---|
| Williamstown, VT | 7° | 78° | 44" | 124" |
| Wilna, NY | 8° | 79° | 42" | 127" |
| Caribou, ME | 2° | 77° | 41" | 118" |
| Sault Ste. Marie, MI | 8° | 76° | 37" | 120" |
| Corry, PA | 16° | 80° | 47" | 114" |
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 Williamstown averaged 1.6° warmer than the 1900s. The biggest change is in December (+3.9°).
A bigger shift than in 67% 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 Williamstown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Williamstown’s place among Vermont’s.
Williamstown weather by month
Highs, lows and precipitation from NOAA’s grid at Williamstown’s center; snow, wet days and snow on the ground from Brookfield 2 Sw, VT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 27° | 7° | 2.9" | 27.5" | 14 | 6° – 26° |
| February | 30° | 9° | 2.5" | 26.0" | 11 | 5° – 26° |
| March | 39° | 18° | 3.0" | 28.1" | 12 | 18° – 39° |
| April | 52° | 29° | 3.4" | 6.1" | 12 | 36° – 46° |
| May | 66° | 40° | 3.7" | 0.0" | 11 | 47° – 58° |
| June | 74° | 49° | 4.6" | 0.0" | 13 | 59° – 66° |
| July | 78° | 55° | 4.6" | 0.0" | 13 | 61° – 71° |
| August | 76° | 52° | 4.2" | 0.0" | 11 | 62° – 67° |
| September | 69° | 45° | 3.6" | 0.0" | 11 | 52° – 61° |
| October | 56° | 35° | 4.4" | 1.6" | 12 | 41° – 52° |
| November | 43° | 26° | 3.2" | 9.3" | 13 | 29° – 40° |
| December | 32° | 15° | 3.4" | 25.6" | 15 | 16° – 35° |
| Year | 53° | 32° | 43.7" | 124.2" | 149 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 18° to 39°. August is the most reliable, staying within 6°.
Where Williamstown’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 Williamstown’s center.
- Snow: Brookfield 2 Sw, VT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Barre Montpelier Airport, 7 miles from the town’s center, 350 ft lower; 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 Williamstown’s climate
What is the weather like in Williamstown?
A typical July afternoon reaches 78°, a January night drops to 7°, and about 124 inches of snow falls in a normal winter. Colder January nights than 96% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Williamstown in winter?
January nights average 7°. About 169 nights a year reach 32° or below and 23 reach 0° or below. In the coldest January of the last 30 years the month averaged 6°.
How much snow does Williamstown get?
About 124 inches in a normal winter at Brookfield 2 Sw, VT, most of it in January, February, March and December.
How hot does it get in Williamstown?
July, with a typical high of 78° and a low of 55°. About 2 days a year reach 90° (Barre Montpelier Airport).
When is the first and last frost in Williamstown?
In half of years the last spring frost (32°) comes by May 16 and the first fall frost by September 29, about 136 frost-free days, at Barre Montpelier Airport.
What growing zone is Williamstown in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −20°.
What is the best time of year to visit Williamstown?
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 Williamstown getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 67% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Williamstown.
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.