Williamstown (NJ) Weather and Climate: A Comprehensive Guide
The temperature in Williamstown can vary greatly throughout the year.
The temperatures shift from very warm
to cold.
It also has a relatively rain/snowy climate with high levels of precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average maximum day and minimum night temperature
Depending on the time of the year, temperatures range from very warm to chilly in Williamstown. On average, daytime temperatures range from a very warm 31°C in July to a chilly 6°C in January.
Nighttime temperatures can drop, with average lows reaching -4°C in January. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Williamstown has a relatively rain/snowy climate with high precipitation levels, averaging 1267 mm of rain/snowfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, June, sees around 139 mm of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 77 mm of rainfall.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
In Williamstown, summer days are longer and more sunny, with daily sunshine hours peaking at 9.2 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.7 hours per average day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Williamstown.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 61%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
clear and no rain partly cloudy and no rain partly cloudy and snowForecast for Williamstown (NJ)
5 m/s
2 m/s
3 m/s
The best time of year to visit Williamstown in the United States of America
Other facts from our historical weather data:The hottest season / summer takes place in June, July, August and September.
July has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 6°C.
June tops the wettest month list with 139 mm of rainfall.
February is the driest month with 77 mm of precipitation.
July is the sunniest month with an average of 275 hours of sunshine.
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.
