Harman US

Williamstown, MA Weather & Growing Conditions

Overnight
43°F
Mostly Cloudy
Mostly cloudy, with a low around 43. North wind around 3 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 43°F Mostly Cloudy 3 mph N 0%
Saturday 66°F Mostly Sunny 1 mph N 0%
Saturday Night 45°F Mostly Cloudy then Slight Chance Rain Showers 0 to 5 mph SE 17%
Sunday 61°F Rain Showers 6 mph SE 95%
Sunday Night 47°F Rain Showers 5 mph NE 95%
Monday 65°F Mostly Sunny 6 mph N 13%
Monday Night 42°F Mostly Cloudy 6 mph NE 5%
Tuesday 62°F Partly Sunny 5 mph NE 7%
Tuesday Night 41°F Mostly Cloudy 3 to 7 mph E 7%
Wednesday 60°F Mostly Sunny 7 to 10 mph E 8%
Wednesday Night 41°F Mostly Cloudy then Slight Chance Rain Showers 8 mph E 22%
Thursday 60°F Chance Rain Showers 6 mph NE 29%
Thursday Night 44°F Chance Rain Showers 6 mph NE 33%
Friday 67°F Chance Rain Showers 6 mph N 25%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Williamstown, MA

Last spring frost
May 10
First fall frost
Oct 4
Growing season
147 days
Hardiness zone
5b

Explore more for Williamstown, MA: full frost dates · planting calendar · Massachusetts frost dates

Climate data from the nearest NOAA station, North Adams Harriman Ap, Ma (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.