The best times to visit Williamstown for ideal weather are

April 30th to June 24th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Williamstown Travel Info

Weather in Williamstown

Temperature

Average temperatures in Williamstown vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 21st percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Williamstown, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 89.1°F (31.7°C) with temperatures rarely dropping below 68.4°F (20.2°C) at night.

Williamstown Temperatures (Fahrenheit)

Key
High
Average
Low

Williamstown Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Williamstown Perceived Temperature (F)

Key
High
Average
Low

Williamstown Perceived Temperature (C)

Key
High
Average
Low

 

Average Williamstown Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 42.1 32.8 23.3
Feb 43.6 33.5 23.7
Mar 53.9 42.5 32.1
Apr 65.2 53.4 42.1
May 75.7 63.6 52.5
Jun 83.3 72.3 62
Jul 87.5 77 67.1
Aug 84.7 73.9 63.9
Sep 79.4 68 57.9
Oct 68.1 56.9 46.6
Nov 57 46 35.8
Dec 49 39.6 30.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 5.6 0.4 -4.8
Feb 6.4 0.8 -4.6
Mar 12.2 5.8 0.1
Apr 18.4 11.9 5.6
May 24.3 17.6 11.4
Jun 28.5 22.4 16.7
Jul 30.8 25 19.5
Aug 29.3 23.3 17.7
Sep 26.3 20 14.4
Oct 20.1 13.8 8.1
Nov 13.9 7.8 2.1
Dec 9.4 4.2 -0.9

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Williamstown are July, September, and then January. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May. For example, on the week of May 21st there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late December with an average of 2 days of significant precipitation the week of December 24th.

When can you find snow in Williamstown? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Williamstown.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Williamstown (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 19% 0 3
Feb 22% 0 2.5
Mar 21% 0 4.2
Apr 26% 0 4.3
May 20% 0 2.9
Jun 26% 0 5.2
Jul 17% 0 3.3
Aug 19% 0 5.3
Sep 18% 0 3.2
Oct 20% 0 3.9
Nov 20% 0 2.9
Dec 29% 0 5.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 19 0 7.6
Feb 22 0 6.4
Mar 21 0 10.7
Apr 26 0 10.9
May 20 0 7.4
Jun 26 0 13.2
Jul 17 0 8.4
Aug 19 0 13.5
Sep 18 0 8.1
Oct 20 0 9.9
Nov 20 0 7.4
Dec 29 0 14

 

Humidity and Wind

Williamstown has some high humidity months, with other comfortably humid months. The least humid month is April (52.7% relative humidity), and the most humid month is October (67.6%).

Wind in Williamstown is usually calm. The windiest month is February, followed by April and March. February’s average wind speed of around 6.6 knots (7.6 MPH or 12.2 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid February where average top sustained speeds reach 14.6 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Williamstown.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 5.7 Light breeze 12.1 Significant breeze
Feb 6.6 Light breeze 13.7 Significant breeze
Mar 6.5 Light breeze 13.3 Significant breeze
Apr 6.5 Light breeze 13.4 Significant breeze
May 5.1 Light breeze 11.4 Significant breeze
Jun 4.5 Light breeze 11.2 Significant breeze
Jul 3.9 Barely noticeable 10.2 Significant breeze
Aug 3.7 Barely noticeable 9.8 Gentle breeze
Sep 4.2 Light breeze 10.2 Significant breeze
Oct 5.1 Light breeze 11.4 Significant breeze
Nov 5.2 Light breeze 11.4 Significant breeze
Dec 5.8 Light breeze 12 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 56.5%
Feb 53.9%
Mar 52.9%
Apr 52.7%
May 61%
Jun 63.2%
Jul 62.5%
Aug 66.5%
Sep 67.5%
Oct 67.6%
Nov 62.5%
Dec 65.5%

 

Is it Safe to Travel to Williamstown?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Williamstown, NJ, US is July, followed by August and June. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Williamstown in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 31.4 in November means 31.4% of the tourists vs. July.

 

 

Overall Williamstown Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 82.1°F (27.8°C) and 45.9°F (7.7°C) with far warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see moderate precipitation with 5 to 8 days of precipitation per month. June – August is the busiest season for tourism in Williamstown, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 83.7°F (28.7°C) and 52.9°F (11.6°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 5 to 6 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Williamstown to be enjoyable for warm weather travelers. The average high during this season is between 49.8°F (9.9°C) and 38.2°F (3.4°C). On average, it rains or snows a fair amount: 6 to 9 times per month. These times of year are fairly slow with tourists.

 

Best Times to Travel› the United States › Williamstown, NJ, US