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Weather in Williamstown, MA · National Weather Service + NOAA

Winter means it in Williamstown

Williamstown has cold winters and pleasant summers. A typical July afternoon reaches 81°, a January night drops to 14°. A typical November afternoon reaches 48°, and nights fall to 29°.

Winter 34°/16°Spring 56°/33°Summer 79°/55°Fall 60°/39°
Right now
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Sunrise 6:28 am · sunset 4:44 pm

Getting the latest forecast from the National Weather Service…

What stands out about Williamstown’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Among Massachusetts’s coldest wintersJanuary nights average 14°, colder than 506 of 541 Massachusetts towns.A short growing season147 frost-free days, from May 10 to Oct 4.Drier than most of Massachusetts44 inches of rain and melted snow a year, less than 538 of 541 Massachusetts towns.
A normal year

Where today sits in Williamstown’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
34° / 16°
Snow is rare
Spring
56° / 33°
Last frost around May 10
Summer
79° / 55°
4 days reach 90° in a normal year
Fall now
60° / 39°
First frost around Oct 4
Pastthe usual first frost (Oct 4). Last frost next spring: May 10
Best months to be outside
MayJunJulAugSep
Highs of 62–84° and lows of 40° or more
When is it wettest?June, with 4.5 inches.Is it warmer than it used to be?+1.7° vs. the 20th century.What is each month like?Highs, lows, rain and snow for all 12.

Weather talk

Road reports, first frosts and storm memories from neighbors in Williamstown.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Williamstown itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at North Adams Harriman Airport, MA (3 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.