Vashon, WA Climate

Vashon, WA is a beautiful island located in the Puget Sound near Seattle. It has a mild, maritime climate with abundant precipitation throughout the year. Summers are warm to hot and moderately humid while winters are cool and wet. The average temperature in the summer is around 65°F, while the winter temperatures usually average around 45°F. Precipitation averages around 40 inches annually with snowfall typically occurring during December through March in higher elevations of the island.

Vashon, Washington gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Vashon averages 4 inches of snow per year. The US average is 28 inches of snow per year.

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

Vashon gets some kind of precipitation, on average, 156 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 76 degrees
Winter Low: the January low is 37
Rain: averages 40 inches of rain a year
Snow: averages 4 inches of snow a year

Bestplaces Comfort Index

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

9.3 Summer - 5.5 Winter

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

Climate	Vashon, Washington	United States
	Unlock	38.1 in.
	3.9 in.	Unlock
	Unlock	106.2 days
	140 days	Unlock
	76.2°	85.8°
	Unlock	21.7°
	7.3	Unlock
	Unlock	4.3
	381 ft.	Unlock

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

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.

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

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

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 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.

Humidity in Vashon is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and September.

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.

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 3.9 inches in Vashon means that it is less snowy than most places in Washington. December is the snowiest month in Vashon with 1.0 inches of snow, and 4 months of the year have significant snowfall.