Climate and monthly weather forecast
Vashon, WA

Share

Weather in January

January, the same as December, in Vashon, Washington, is another chilly winter month, with an average temperature varying between 44.6°F (7°C) and 35.2°F (1.8°C). The onset of January manifests an average high-temperature of a still frosty 44.6°F (7°C), demonstrating a minor variation from the preceding month. Weather in January »

Weather in February

February, the last month of the winter in Vashon, is another chilly month, with an average temperature ranging between max 46°F (7.8°C) and min 34.9°F (1.6°C). A minimal variation is noted in Vashon's average high-temperature at the onset of February, reaching a still chilly 46°F (7.8°C) from January's 44.6°F (7°C). Weather in February »

Weather in March

The first month of the spring, March, is a fresh month in Vashon, Washington, with an average temperature varying between 37.2°F (2.9°C) and 51.1°F (10.6°C). The transition into March is marked with an average high-temperature of a cool 51.1°F (10.6°C), showing an insignificant shift from February's 46°F (7.8°C). Weather in March »

Weather in April

April in Vashon, Washington, is a refreshing spring month, with an average temperature fluctuating between 56.7°F (13.7°C) and 39.7°F (4.3°C). Vashon's transition into April sees a mild rise in the average high-temperature, edging from a cool 51.1°F (10.6°C) in March to a mild 56.7°F (13.7°C). Weather in April »

Weather in May

May, the last month of the spring in Vashon, is a refreshing month, with an average temperature ranging between min 44.4°F (6.9°C) and max 65.3°F (18.5°C). Vashon observes a slight ascent in average high-temperatures during May, adjusting from 56.7°F (13.7°C) in April to a still refreshing 65.3°F (18.5°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Vashon, Washington, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 70°F (21.1°C). June's advent denotes a minor fluctuation in the average high-temperature to a pleasant 70°F (21.1°C) from May's 65.3°F (18.5°C). Weather in June »

Weather in July

July is a moderately hot summer month in Vashon, Washington, with an average temperature ranging between max 77.2°F (25.1°C) and min 52.5°F (11.4°C). As Vashon enters July, the average high-temperature marginally increases from the a pleasant 70°F (21.1°C) of June to a moderately hot 77.2°F (25.1°C). Weather in July »

Weather in August

August, the last month of the summer in Vashon, is another warm month, with an average temperature varying between 53.6°F (12°C) and 77.7°F (25.4°C). August temperatures tend to peak at an average high of 77.7°F (25.4°C) and dip to a low of 53.6°F (12°C). Weather in August »

Weather in September

September, the first month of the autumn in Vashon, is still a pleasant month, with temperature in the range of an average low of 50.4°F (10.2°C) and an average high of 70.3°F (21.3°C). The average high-temperature slightly decreases in September, shifting from a warm 77.7°F (25.4°C) in August to an agreeable 70.3°F (21.3°C). Weather in September »

Weather in October

October, the same as September, in Vashon, Washington, is another mild autumn month, with an average temperature varying between 44.8°F (7.1°C) and 59°F (15°C). The shift from September to October corresponds with a decrease in the average high-temperature, down to a refreshing 59°F (15°C) from a pleasant 70.3°F (21.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Vashon, is another chilly month, with an average temperature fluctuating between 49.1°F (9.5°C) and 39°F (3.9°C). November's arrival comes with a decrease in the average high-temperature, moving from a refreshing 59°F (15°C) in October to a frosty 49.1°F (9.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a frosty month in Vashon, Washington, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 34.3°F (1.3°C). Vashon's coldest weather arrives in December, when temperatures average a high of 43.5°F (6.4°C) and a low of 34.3°F (1.3°C). Weather in December »
[Resources]

Frequently asked questions

What is the most humid month in Vashon?

The months with the highest humidity in Vashon are January and December, with an average relative humidity of 85%.

How much does it rain in Vashon?

In Vashon, Washington, during the entire year, the rain falls for 138.2 days and collects up to 14.09" (358mm) of precipitation.

When does it snow in Vashon?

January through March, November and December are months with snowfall.

How much does it snow in Vashon?

In Vashon, Washington, during the entire year, snow falls for 9.8 days and aggregates up to 4.72" (120mm) of snow.

What are the months with the lowest UV index in Vashon?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the snowiest month in Vashon?

February is the month with the most snowfall. Snow falls for 3.4 days and accumulates 2.52" (64mm) of snow.

When is Daylight Saving Time (DST) in Vashon?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When it does not snow in Vashon?

In Vashon, snow does not fall in April through October.

When are the longest days in Vashon?

With an average of 15h and 54min of daylight, June has the longest days of the year in Vashon.

When is the highest UV index in Vashon?

The months with the highest UV index are June through August, with an average maximum UV index of 5.

What is the least humid month in Vashon?

July is the least humid month, with an average relative humidity of 68%.

What is the driest month in Vashon?

The month with the least rainfall in Vashon is July, when the rain falls for 6.3 days and typically collects 0.31" (8mm) of precipitation.

What are the warmest months in Vashon?

August, with an average high of 77.7°F (25.4°C) and a low of 53.6°F (12°C), signifies the warmest month of the year in Vashon, Washington.

What month has the most sunshine in Vashon?

August has the most sunshine of the year, with an average of 10.7h of sunshine.

What is the coldest month in Vashon?

During the coldest month in Vashon, December, temperatures average a high of 43.5°F (6.4°C) and a low of 34.3°F (1.3°C).

What is the rainiest month in Vashon?

December is the month with the most rainfall. Rain falls for 13.5 days and accumulates 2.2" (56mm) of precipitation.

What is the month with the shortest days in Vashon?

The month with the shortest days in Vashon is December, with an average of 8h and 30min of daylight.

What is the month with the least sunshine in Vashon?

December has the least sunshine of the year in Vashon, with an average of 4.1h of sunshine.

Average temperature
Vashon, WA

Average temperature - Vashon, WA

The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).

The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).

[Resources]

Average pressure
Vashon, WA

Average pressure - Vashon, WA

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

[Resources]

Average wind speed
Vashon, WA

Average wind speed - Vashon, WA

The windiest month (with the highest average wind speed) is March (5.3mph).
The calmest months (with the lowest average wind speed) are July and August (3.6mph).

[Resources]

Average humidity
Vashon, WA

Average humidity - Vashon, WA

The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).

[Resources]

Average rainfall
Vashon, WA

Average rainfall - Vashon, WA

The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").

[Resources]

Average rainfall days
Vashon, WA

Average rainfall days - Vashon, WA

The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).

[Resources]

Average snowfall
Vashon, WA

Average snowfall - Vashon, WA

The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days
Vashon, WA

Average snowfall days - Vashon, WA

The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight / Average sunshine
Vashon, WA

Average daylight / Average sunshine - Vashon, WA

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

[Resources]

Average sunshine days
Vashon, WA

Average sunshine days - Vashon, WA

The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).

[Resources]

Average UV index
Vashon, WA

Average UV index - Vashon, WA

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

[Resources]

Average visibility
Vashon, WA

Average visibility - Vashon, WA

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).

[Resources]

Vashon, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location