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