Williamstown, MA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamstown, a community in Berkshire County, Massachusetts.
Overnight
53°F
Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 53. Northwest wind around 1 mph.
7-day forecast for Williamstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Patchy Fog | 1 mph NW | 0% |
| Tuesday | 81°F | Patchy Fog then Sunny | 0 to 3 mph W | 0% |
| Tuesday Night | 58°F | Partly Cloudy | 1 mph SE | 0% |
| Wednesday | 83°F | Patchy Fog then Partly Sunny | 0 to 3 mph SW | 0% |
| Wednesday Night | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph S | 15% |
| Thursday | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 66% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms | 2 mph SW | 66% |
| Friday | 85°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 66% |
| Friday Night | 66°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 mph W | 66% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 63% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 2 mph W | 63% |
| Sunday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 6 mph W | 18% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 to 5 mph SW | 18% |
| Monday | 84°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 9 mph W | 40% |
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 Aug 4, 2026.