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Williamstown (MA) Weather and Climate: A Comprehensive Guide

The temperature in Williamstown can vary quite a bit throughout the year. Temperatures can be warm during the warmest months, and very cold during the cooler months. It also has a notably wet climate with much precipitation. Now, let’s explore all the climate details to give you a full picture.

Average maximum day and minimum night temperature

Visitors to Williamstown can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 27°C in July, the warmest time of the year, to a very cold -0°C during cooler months like January.

At night, temperatures typically drop to an average of around -10°C during these months. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Williamstown is known for its substantial rain/snowfall, with annual precipitation reaching 1204 mm. While rainfall varies throughout the year, each season offers its own charm. October brings wetter days averaging 133 mm of precipitation, spread over 14 rainy days.

In contrast, November experiences a drier climate, with about 71 mm of rainfall spread across 11 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

Forecast for Williamstown (MA)

Sun   Dec 22
-10°C | -16°C
NW 5 m/s
almost clear and no rain

almost clear and no rain

Mon   Dec 23
-2°C | -18°C
SW 3 m/s
1.4 mm
partly cloudy and no rain

partly cloudy and no rain

Tue   Dec 24
1°C | -6°C
N 2 m/s
10 mm
overcast and snow

overcast and snow

The best time of year to visit Williamstown in the United States of America

During the months of May, June, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Which is the warmest month in Williamstown?
    July has an average maximum temperature of 27°C and is the warmest month of the year.
  • Which is the coldest month in Williamstown?
    The coldest month is January with an average maximum temperature of -0°C.
  • Which is the wettest month in Williamstown?
    October tops the wettest month list with 133 mm of rainfall.
  • Which is the driest month in Williamstown?
    November is the driest month with 71 mm of precipitation.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.