2025 Compare Climate & Weather:
Rotterdam, NY vs Vashon, WA

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Highlights

On average, there are 140 sunny days per year in Vashon. Rotterdam averages 180 sunny days per year. The US average is 205 sunny days.

Vashon, Washington gets 39.9 inches of rain, on average, per year. Rotterdam, New York gets 40.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Vashon averages 3.9 inches of snow per year. Rotterdam averages 59.8 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Vashon, Washington
Summer High: the July high is around 76.2 degrees
Winter Low: the January low is 36.9
Rain: averages 39.9 inches of rain a year
Snow: averages 3.9 inches of snow a year

Rotterdam, New York
Summer High: the July high is around 83 degrees
Winter Low: the January low is 13.8
Rain: averages 40.5 inches of rain a year
Snow: averages 59.8 inches of snow a year

BestPlaces Comfort Index

Vashon

The annual BestPlaces Comfort Index for Vashon is 7.3 (10=best), which means it is more comfortable than most places in Washington.

7.3 / 10

August, July and September are the most pleasant months in Vashon, while December and January are the least comfortable months.

Rotterdam

The annual BestPlaces Comfort Index for Rotterdam is 6.7 (10=best), which means it is about average compared to other places in New York.

6.7 / 10

August, July and June are the most pleasant months in Rotterdam, while January and February are the least comfortable months.

Average Monthly High / Low (°F)

Month	Rotterdam, NY	Vashon, WA
January	31° / 14°	47° / 37°
February	35° / 16°	50° / 37°
March	45° / 25°	54° / 39°
April	59° / 37°	59° / 42°
May	70° / 47°	65° / 47°
June	79° / 56°	70° / 52°
July	83° / 61°	76° / 55°
August	81° / 60°	77° / 55°
September	73° / 51°	71° / 52°
October	61° / 40°	60° / 46°
November	48° / 31°	51° / 40°
December	36° / 21°	46° / 36°

Hot, Freezing, Rainy, Snowy Days: Rotterdam / Vashon

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	29 / 6	12 / 19	10 / 1
February	0 / 0	26 / 5	10 / 15	7 / 1
March	0 / 0	24 / 2	12 / 18	5 / 0
April	0 / 0	9 / 0	12 / 15	1 / 0
May	0 / 0	1 / 0	13 / 12	0 / 0
June	2 / 0	0 / 0	12 / 9	0 / 0
July	4 / 1	0 / 0	12 / 5	0 / 0
August	2 / 1	0 / 0	11 / 5	0 / 0
September	0 / 0	0 / 0	10 / 8	0 / 0
October	0 / 0	6 / 0	11 / 14	0 / 0
November	0 / 0	17 / 3	12 / 19	2 / 0
December	0 / 0	26 / 8	12 / 18	7 / 1

July is the hottest month for Rotterdam with an average high temperature of 83.0°, which ranks it as warmer than most places in New York. In Rotterdam, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rotterdam are June, August and September.

August is the hottest month for Vashon with an average high temperature of 76.5°, which ranks it as about average compared to other places in Washington. In Vashon, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Vashon are August, July and September.

January has the coldest nighttime temperatures for Rotterdam with an average of 13.8°. This is colder than most places in New York.

December has the coldest nighttime temperatures for Vashon with an average of 35.6°. This is one of the warmest places in Washington.

In Rotterdam, there are 8.5 days annually when the high temperature is over 90°, which is hotter than most places in New York.

In Vashon, there are 2.6 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Rotterdam, there are 136.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New York.

In Vashon, there are 25.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Washington.

In Rotterdam, there are 9.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New York.

In Vashon, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

July is the wettest month in Rotterdam with 4.2 inches of rain, and the driest month is February with 2.3 inches. The wettest season is Autumn with 29% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 40.5 inches in Rotterdam means that it is drier than most places in New York.

November is the wettest month in Vashon with 6.5 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 39% of yearly precipitation and 9% occurs in Autumn, which is the driest season. The annual rainfall of 39.9 inches in Vashon means that it is about average compared to other places in Washington.

May is the rainiest month in Rotterdam with 13.2 days of rain, and February is the driest month with only 9.5 rainy days. There are 136.5 rainy days annually in Rotterdam, which is rainier than most places in New York. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 24% chance of a rainy day.

November is the rainiest month in Vashon with 19.0 days of rain, and August is the driest month with only 5.0 rainy days. There are 156.1 rainy days annually in Vashon, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 13% chance of a rainy day.

An annual snowfall of 59.8 inches in Rotterdam means that it is snowier than most places in New York.

An annual snowfall of 3.9 inches in Vashon means that it is less snowy than most places in Washington.

January is the snowiest month in Rotterdam with 18.0 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Vashon with 1.0 inches of snow, and 4 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 Rotterdam 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

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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

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Reviews for Vashon 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

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2025 Compare Climate & Weather:
Rotterdam, NY vs Vashon, WA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Rotterdam / Vashon

January has the coldest nighttime temperatures for Rotterdam with an average of 13.8°. This is colder than most places in New York.

December has the coldest nighttime temperatures for Vashon with an average of 35.6°. This is one of the warmest places in Washington.

In Rotterdam, there are 8.5 days annually when the high temperature is over 90°, which is hotter than most places in New York.

In Vashon, there are 2.6 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Rotterdam, there are 136.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New York.

In Vashon, there are 25.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Washington.

In Rotterdam, there are 9.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New York.

In Vashon, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

An annual snowfall of 59.8 inches in Rotterdam means that it is snowier than most places in New York.

An annual snowfall of 3.9 inches in Vashon means that it is less snowy than most places in Washington.

January is the snowiest month in Rotterdam with 18.0 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Vashon with 1.0 inches of snow, and 4 months of the year have significant snowfall.

DID YOU KNOW?

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Reviews for Vashon 2 Reviews

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2025 Compare Climate & Weather:Rotterdam, NY vs Vashon, WA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Rotterdam / Vashon

January has the coldest nighttime temperatures for Rotterdam with an average of 13.8°. This is colder than most places in New York.December has the coldest nighttime temperatures for Vashon with an average of 35.6°. This is one of the warmest places in Washington.

In Rotterdam, there are 8.5 days annually when the high temperature is over 90°, which is hotter than most places in New York.In Vashon, there are 2.6 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Rotterdam, there are 136.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New York.In Vashon, there are 25.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Washington.

In Rotterdam, there are 9.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New York.In Vashon, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

An annual snowfall of 59.8 inches in Rotterdam means that it is snowier than most places in New York.An annual snowfall of 3.9 inches in Vashon means that it is less snowy than most places in Washington.

January is the snowiest month in Rotterdam with 18.0 inches of snow, and 6 months of the year have significant snowfall.December is the snowiest month in Vashon with 1.0 inches of snow, and 4 months of the year have significant snowfall.

DID YOU KNOW?

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Reviews for Vashon 2 Reviews

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2025 Compare Climate & Weather:
Rotterdam, NY vs Vashon, WA

January has the coldest nighttime temperatures for Rotterdam with an average of 13.8°. This is colder than most places in New York.

December has the coldest nighttime temperatures for Vashon with an average of 35.6°. This is one of the warmest places in Washington.

In Rotterdam, there are 8.5 days annually when the high temperature is over 90°, which is hotter than most places in New York.

In Vashon, there are 2.6 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Rotterdam, there are 136.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in New York.

In Vashon, there are 25.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Washington.

An annual snowfall of 59.8 inches in Rotterdam means that it is snowier than most places in New York.

An annual snowfall of 3.9 inches in Vashon means that it is less snowy than most places in Washington.

January is the snowiest month in Rotterdam with 18.0 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Vashon with 1.0 inches of snow, and 4 months of the year have significant snowfall.