Harman US

Williamstown, MA Weather & Growing Conditions

Overnight
45°F
Partly Cloudy
Partly cloudy, with a low around 45. North wind around 2 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 45°F Partly Cloudy 2 mph N 0%
Saturday 66°F Mostly Sunny 2 mph SE 0%
Saturday Night 44°F Mostly Cloudy 1 to 6 mph SE 2%
Sunday 57°F Rain 5 to 8 mph SE 100%
Sunday Night 42°F Rain then Chance Rain Showers 3 to 7 mph NE 89%
Monday 64°F Partly Sunny 7 mph N 0%
Monday Night 39°F Mostly Cloudy 2 to 6 mph NE 1%
Tuesday 63°F Partly Sunny 5 mph NE 1%
Tuesday Night 39°F Mostly Cloudy 6 mph E 1%
Wednesday 63°F Partly Sunny 6 to 10 mph E 3%
Wednesday Night 39°F Mostly Cloudy then Slight Chance Rain Showers 6 to 9 mph E 18%
Thursday 62°F Chance Rain Showers 7 mph NE 30%
Thursday Night 40°F Chance Rain Showers 7 mph NE 33%
Friday 64°F Chance Rain Showers 8 mph NE 31%

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.