Climate and monthly weather forecast
Friday Harbor, WA

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Weather in January

January, like December, is a frosty winter month in Friday Harbor, Washington, with an average temperature ranging between min 41°F (5°C) and max 45.3°F (7.4°C). The coldest period falls in January, February and December, when the average high-temperature reaches 45.3°F (7.4°C). Weather in January »

Weather in February

February, the last month of the winter in Friday Harbor, is also a frosty month, with an average temperature varying between 45.3°F (7.4°C) and 40.5°F (4.7°C). The yearly lowest temperatures occur in January, February and December, averaging a high-temperature of 45.3°F (7.4°C). Weather in February »

Weather in March

March, the first month of the spring in Friday Harbor, is still a chilly month, with an average temperature fluctuating between 48.4°F (9.1°C) and 43°F (6.1°C). The arrival of March sees an average high-temperature of a still chilly 48.4°F (9.1°C), hardly diverging from February's 45.3°F (7.4°C). Weather in March »

Weather in April

April is a fresh spring month in Friday Harbor, Washington, with an average temperature ranging between max 52.2°F (11.2°C) and min 46.2°F (7.9°C). The transition from March to April sees an average high-temperature of a fresh 52.2°F (11.2°C), indicating a minor variance from the prior month. Weather in April »

Weather in May

May, the last month of the spring in Friday Harbor, is a moderate month, with an average temperature varying between 57.7°F (14.3°C) and 50.9°F (10.5°C). A slight uplift of average high-temperatures is noted in May, with temperatures adjusting from a fresh 52.2°F (11.2°C) in April to a refreshing 57.7°F (14.3°C). Weather in May »

Weather in June

June, the first month of the summer in Friday Harbor, is an enjoyable month, with an average temperature varying between 61.3°F (16.3°C) and 54°F (12.2°C). The transition from May to June sees average high-temperatures adjusting to a comfortable 61.3°F (16.3°C), from a not significantly different 57.7°F (14.3°C). Weather in June »

Weather in July

July, the same as June, is another enjoyable summer month in Friday Harbor, Washington, with temperature in the range of an average low of 57.2°F (14°C) and an average high of 64.9°F (18.3°C). July is the month when Friday Harbor sees the highest average temperatures, with a high of 64.9°F (18.3°C) and a low of 57.2°F (14°C). Weather in July »

Weather in August

The last month of the summer, August, is also an enjoyable month in Friday Harbor, Washington, with an average temperature varying between 57.7°F (14.3°C) and 64.4°F (18°C). August's presence marks an average high-temperature of a still refreshing 64.4°F (18°C), subtly varied from July's 64.9°F (18.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an enjoyable month in Friday Harbor, Washington, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 55.6°F (13.1°C). In Friday Harbor, September's average high-temperature stands at a still refreshing 61.3°F (16.3°C), closely related to the preceding month. Weather in September »

Weather in October

October, like September, is a moderate autumn month in Friday Harbor, Washington, with temperature in the range of an average low of 50.9°F (10.5°C) and an average high of 55.4°F (13°C). The arrival of October corresponds with a light shift in temperature, down from an enjoyable 61.3°F (16.3°C) in September to a moderate 55.4°F (13°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Friday Harbor, Washington, with an average temperature ranging between max 50.2°F (10.1°C) and min 45.5°F (7.5°C). Friday Harbor's weather in November displays an average high-temperature of a fresh 50.2°F (10.1°C), showing minor disparity from October's 55.4°F (13°C). Weather in November »

Weather in December

The first month of the winter, December, is still a chilly month in Friday Harbor, Washington, with an average temperature fluctuating between 40.6°F (4.8°C) and 45.3°F (7.4°C). Friday Harbor's coldest period falls in January, February and December, when the average high-temperatures ascend to 45.3°F (7.4°C). Weather in December »
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Frequently asked questions

What are the coldest months in Friday Harbor?

During January, February and December, Friday Harbor experiences its lowest temperatures, averaging a high-temperature of 45.3°F (7.4°C).

What is the most humid month in Friday Harbor?

The months with the highest humidity in Friday Harbor are January, August and September, with an average relative humidity of 79%.

How much does it rain in Friday Harbor?

Throughout the year, there are 167.7 rainfall days, and 23.46" (596mm) of precipitation is accumulated.

When does it snow in Friday Harbor?

Months with snowfall in Friday Harbor are January through March, November and December.

How many days does it snow in Friday Harbor?

Throughout the year, there are 6.9 snowfall days, and 3.43" (87mm) of snow is accumulated.

When is the ocean coldest in Friday Harbor?

The months with the coldest seawater are January and February, with an average ocean temperature of 45°F (7.2°C).

When is the lowest UV index in Friday Harbor?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Friday Harbor, Washington.

What is the snowiest month in Friday Harbor?

The month with the most snowfall in Friday Harbor, Washington, is February, when snow falls for 2.7 days and typically aggregates up to 1.77" (45mm) of snow.

When is Daylight Saving Time (DST) in Friday Harbor?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Friday Harbor, 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.

What is the least humid month in Friday Harbor?

With an average relative humidity of 76%, April is the least humid month in Friday Harbor, Washington.

When it does not snow in Friday Harbor?

In Friday Harbor, Washington, snow does not fall in April through October.

When are the longest days in Friday Harbor?

With an average of 16h and 6min of daylight, June has the longest days of the year in Friday Harbor, Washington.

What part of the year is the hottest in Friday Harbor?

July, marked by an average high-temperature of 64.9°F (18.3°C) and a low-temperature of 57.2°F (14°C), is the warmest month in Friday Harbor, Washington.

What is the driest month in Friday Harbor?

The month with the least rainfall in Friday Harbor is July, when the rain falls for 6.1 days and typically collects 0.43" (11mm) of precipitation.

What month has the most sunshine in Friday Harbor?

July has the most sunshine of the year in Friday Harbor, Washington, with an average of 11.1h of sunshine.

When is the highest UV index in Friday Harbor?

With an average maximum UV index of 5, July is the month with the highest UV index in Friday Harbor, Washington.

When is the ocean warmest in Friday Harbor?

The months with the warmest seawater in Friday Harbor are August and September, with an average ocean temperature of 52.3°F (11.3°C).

What is the rainiest month in Friday Harbor?

November is the month with the most rainfall in Friday Harbor, Washington. Rain falls for 19.1 days and accumulates 3.43" (87mm) of precipitation.

What is the month with the shortest days in Friday Harbor?

With an average of 8h and 24min of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Friday Harbor?

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

Average temperature
Friday Harbor, WA

Average temperature - Friday Harbor, WA

The warmest month (with the highest average high temperature) is July (64.9°F).
The months with the lowest average high temperature are January, February and December (45.3°F).

The month with the highest average low temperature is August (57.7°F).
The coldest month (with the lowest average low temperature) is February (40.5°F).

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Average pressure
Friday Harbor, WA

Average pressure - Friday Harbor, WA

The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).

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Average wind speed
Friday Harbor, WA

Average wind speed - Friday Harbor, WA

The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity
Friday Harbor, WA

Average humidity - Friday Harbor, WA

The months with the highest relative humidity are January, August and September (79%).
The month with the lowest relative humidity is April (76%).

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Average rainfall
Friday Harbor, WA

Average rainfall - Friday Harbor, WA

The wettest month (with the highest rainfall) is November (3.43").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days
Friday Harbor, WA

Average rainfall days - Friday Harbor, WA

The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (5.3 days).

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Average snowfall
Friday Harbor, WA

Average snowfall - Friday Harbor, WA

The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Friday Harbor, WA

Average snowfall days - Friday Harbor, WA

The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature
Friday Harbor, WA

Average sea temperature - Friday Harbor, WA

The best months for swimming (with the highest average sea temperature) are August and September (52.3°F).
The coldest month (with the lowest average sea temperature) is February (44.9°F).

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Average daylight / Average sunshine
Friday Harbor, WA

Average daylight / Average sunshine - Friday Harbor, WA

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

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Average sunshine days
Friday Harbor, WA

Average sunshine days - Friday Harbor, WA

The month with the most sunshine days is August (24.7 days).
The month with the least sunshine days is November (8.7 days).

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Average UV index
Friday Harbor, WA

Average UV index - Friday Harbor, WA

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

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Average cloud cover
Friday Harbor, WA

Average cloud cover - Friday Harbor, WA

The months with the most cloud cover are February and December (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 23).

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Average visibility
Friday Harbor, WA

Average visibility - Friday Harbor, WA

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

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Friday Harbor, Washington, USA

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