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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.