The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Bryn Mawr, PA vs Williamstown, NJ

2025 Compare Climate & Weather:
Bryn Mawr, PA vs Williamstown, NJ

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Highlights

On average, there are 207 sunny days per year in Williamstown. Bryn Mawr averages 201 sunny days per year. The US average is 205 sunny days.

Williamstown, New Jersey gets 46 inches of rain, on average, per year. Bryn Mawr, Pennsylvania gets 48.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Williamstown averages 18.6 inches of snow per year. Bryn Mawr averages 20.7 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Williamstown, New Jersey
Summer High: the July high is around 86.7 degrees
Winter Low: the January low is 23.1
Rain: averages 46 inches of rain a year
Snow: averages 18.6 inches of snow a year

Bryn Mawr, Pennsylvania
Summer High: the July high is around 86.3 degrees
Winter Low: the January low is 21.7
Rain: averages 48.3 inches of rain a year
Snow: averages 20.7 inches of snow a year

BestPlaces Comfort Index
Williamstown

The annual BestPlaces Comfort Index for Williamstown is 7.2 (10=best), which means it is about average compared to other places in New Jersey.

7.2 / 10
September, June and May are the most pleasant months in Williamstown, while January and February are the least comfortable months.

Bryn Mawr

The annual BestPlaces Comfort Index for Bryn Mawr is 7.2 (10=best), which means it is one of the most pleasant places in Pennsylvania.

7.2 / 10
June, September and May are the most pleasant months in Bryn Mawr, while January and February are the least comfortable months.

Average Monthly High / Low (°F)
MonthBryn Mawr, PAWilliamstown, NJ
January39° / 22°41° / 23°
February43° / 24°44° / 25°
March52° / 31°52° / 32°
April64° / 40°64° / 41°
May73° / 50°73° / 50°
June82° / 60°82° / 61°
July86° / 65°87° / 65°
August84° / 63°85° / 64°
September77° / 55°78° / 56°
October65° / 43°66° / 44°
November55° / 35°56° / 36°
December44° / 26°45° / 27°
Hot, Freezing, Rainy, Snowy Days: Bryn Mawr / Williamstown
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 026 / 2510 / 104 / 3
February0 / 023 / 229 / 102 / 2
March0 / 017 / 1710 / 101 / 1
April0 / 05 / 412 / 110 / 0
May1 / 10 / 011 / 110 / 0
June4 / 40 / 010 / 100 / 0
July9 / 90 / 010 / 100 / 0
August5 / 50 / 09 / 80 / 0
September1 / 10 / 09 / 80 / 0
October0 / 03 / 29 / 90 / 0
November0 / 012 / 1110 / 90 / 0
December0 / 023 / 2210 / 102 / 1
July is the hottest month for Bryn Mawr with an average high temperature of 86.3°, which ranks it as one of the hottest places in Pennsylvania. In Bryn Mawr, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Bryn Mawr are September, June and May.

July is the hottest month for Williamstown with an average high temperature of 86.7°, which ranks it as warmer than most places in New Jersey. In Williamstown, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Williamstown are September, June and May.
January has the coldest nighttime temperatures for Bryn Mawr with an average of 21.7°. This is warmer than most places in Pennsylvania.

January has the coldest nighttime temperatures for Williamstown with an average of 23.1°. This is warmer than most places in New Jersey.

In Bryn Mawr, there are 20.4 days annually when the high temperature is over 90°, which is one of the hottest places in Pennsylvania.

In Williamstown, there are 21.4 days annually when the high temperature is over 90°, which is hotter than most places in New Jersey.

In Bryn Mawr, there are 109.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Pennsylvania.

In Williamstown, there are 104.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in New Jersey.

In Bryn Mawr, there are 1.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Pennsylvania.

In Williamstown, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New Jersey.

September is the wettest month in Bryn Mawr with 4.8 inches of rain, and the driest month is February with 2.9 inches. The wettest season is Autumn with 26% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 48.3 inches in Bryn Mawr means that it is one of the wettest places in Pennsylvania.


July is the wettest month in Williamstown with 4.6 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 28% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 46.0 inches in Williamstown means that it is drier than most places in New Jersey.

April is the rainiest month in Bryn Mawr with 11.6 days of rain, and September is the driest month with only 8.5 rainy days. There are 115.9 rainy days annually in Bryn Mawr, which is less rainy than most places in Pennsylvania. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.

April is the rainiest month in Williamstown with 11.4 days of rain, and September is the driest month with only 8.0 rainy days. There are 115.5 rainy days annually in Williamstown, which is less rainy than most places in New Jersey. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 20.7 inches in Bryn Mawr means that it is less snowy than most places in Pennsylvania.

An annual snowfall of 18.6 inches in Williamstown means that it is less snowy than most places in New Jersey.
February is the snowiest month in Bryn Mawr with 7.7 inches of snow, and 5 months of the year have significant snowfall.

February is the snowiest month in Williamstown with 6.8 inches of snow, and 5 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Bryn Mawr    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Bryn Mawr

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Reviews for Williamstown    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Williamstown

See all reviews
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