Williamstown, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Berkshire County, Massachusetts.
This Afternoon
74°F
Sunny
Sunny. High near 74, with temperatures falling to around 68 in the afternoon. Southwest wind around 6 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Sunny | 6 mph SW | 2% |
| Tonight | 56°F | Mostly Cloudy | 6 mph SE | 2% |
| Thursday | 69°F | Light Rain | 9 mph S | 92% |
| Thursday Night | 58°F | Light Rain Likely | 0 to 7 mph SW | 65% |
| Friday | 69°F | Chance Light Rain | 1 mph W | 43% |
| Friday Night | 49°F | Chance Light Rain | 0 mph | 44% |
| Saturday | 61°F | Chance Light Rain | 0 to 3 mph NW | 44% |
| Saturday Night | 39°F | Chance Light Rain | 2 to 8 mph NW | 52% |
| Sunday | 53°F | Chance Light Rain | 5 to 9 mph NW | 29% |
| Sunday Night | 31°F | Mostly Cloudy | 6 mph W | 14% |
| Monday | 52°F | Chance Light Rain | 6 to 13 mph W | 28% |
| Monday Night | 29°F | Slight Chance Light Rain | 5 to 9 mph W | 22% |
| Tuesday | 55°F | Mostly Sunny then Slight Chance Light Rain | 5 to 12 mph W | 18% |
| Tuesday Night | 29°F | Slight Chance Light Rain | 9 mph W | 20% |
Forecast source: National Weather Service (api.weather.gov) for Williamstown (42.709, -73.201). Updated through the day.
Growing snapshot for Williamstown
Last spring frost
May 10
First fall frost
Oct 4
Growing season
147 days
Hardiness zone
5b
More local growing data for Williamstown: nearby ZIP 01267 weather · frost dates · planting calendar · Massachusetts frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, North Adams Harriman Ap, Ma (4.2 mi from Williamstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.