Williamstown, MA Weather & Growing Conditions
Today
73°F
Sunny
Sunny. High near 73, with temperatures falling to around 67 in the afternoon. South wind 1 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 1 to 7 mph S | 2% |
| Tonight | 55°F | Mostly Cloudy | 8 mph S | 2% |
| Thursday | 68°F | Light Rain | 10 mph S | 92% |
| Thursday Night | 58°F | Light Rain Likely | 1 to 9 mph SW | 65% |
| Friday | 68°F | Chance Light Rain | 2 mph W | 44% |
| Friday Night | 48°F | Chance Light Rain | 1 mph N | 44% |
| Saturday | 60°F | Chance Light Rain | 3 mph NW | 43% |
| Saturday Night | 38°F | Chance Light Rain | 5 to 9 mph NW | 51% |
| Sunday | 52°F | Chance Light Rain | 6 to 9 mph NW | 28% |
| Sunday Night | 31°F | Mostly Cloudy | 7 mph W | 13% |
| Monday | 51°F | Chance Light Rain | 7 to 13 mph W | 28% |
| Monday Night | 29°F | Slight Chance Light Rain | 5 to 10 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). 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 Nov 4, 2026.