Friday Harbor
Washington, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Friday Harbor, WA

January, like December, is another chilly winter month in Friday Harbor, Washington, with average temperature ranging between max 46.9°F (8.3°C) and min 36°F (2.2°C). In Friday Harbor, the average high-temperature in January is practically the same as in December - a still frosty 46.9°F (8.3°C). Weather in January »
February, the last month of the winter, in Friday Harbor, is also a frosty month, with average temperature fluctuating between 36°F (2.2°C) and 48.9°F (9.4°C). In Friday Harbor, the average high-temperature is relatively the same as in January - a still chilly 48.9°F (9.4°C). Weather in February »

March, the first month of the spring, in Friday Harbor, is a cool month, with average temperature varying between 53.1°F (11.7°C) and 37.9°F (3.3°C). In Friday Harbor, the average high-temperature is practically the same as in February - a fresh 53.1°F (11.7°C). Weather in March »

April is a moderate spring month in Friday Harbor, Washington, with average temperature varying between 41°F (5°C) and 57.9°F (14.4°C). In April, the average high-temperature is essentially the same as in March - a mild 57.9°F (14.4°C). Weather in April »

The last month of the spring, May, is an enjoyable month in Friday Harbor, Washington, with average temperature ranging between min 45°F (7.2°C) and max 63°F (17.2°C). In Friday Harbor, Washington, the average high-temperature is almost the same as in April - an enjoyable 63°F (17.2°C). Weather in May »

The first month of the summer, June, is also an enjoyable month in Friday Harbor, Washington, with average temperature ranging between max 66.9°F (19.4°C) and min 48°F (8.9°C). In June, the average high-temperature is relatively the same as in May - a still enjoyable 66.9°F (19.4°C). Weather in June »

July in Friday Harbor, Washington, is a pleasant summer month, with average temperature ranging between max 71.1°F (21.7°C) and min 51.1°F (10.6°C). The warmest months are July and August, with an average high-temperature of 71.1°F (21.7°C). Weather in July »

The last month of the summer, August, is also an agreeable month in Friday Harbor, Washington, with average temperature fluctuating between 51.1°F (10.6°C) and 71.1°F (21.7°C). The warmest months are July and August, with an average high-temperature of 71.1°F (21.7°C). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Friday Harbor, Washington, with average temperature varying between 48°F (8.9°C) and 66.9°F (19.4°C). In September, the average high-temperature is essentially the same as in August - a comfortable 66.9°F (19.4°C). Weather in September »

October, the same as September, in Friday Harbor, Washington, is a moderate autumn month, with average temperature ranging between min 44.1°F (6.7°C) and max 59°F (15°C). In October, the average high-temperature marginally drops, from an enjoyable 66.9°F (19.4°C) in September, to a moderate 59°F (15°C). Weather in October »

November, the last month of the autumn, in Friday Harbor, is also a fresh month, with average temperature varying between 37.9°F (3.3°C) and 50°F (10°C). In Friday Harbor, the average high-temperature in November drops, from a mild 59°F (15°C) in October, to a fresh 50°F (10°C). Weather in November »

The first month of the winter, December, is also a frosty month in Friday Harbor, Washington, with average temperature varying between 34°F (1.1°C) and 46°F (7.8°C). With an average high-temperature of 46°F (7.8°C) and an average low-temperature of 34°F (1.1°C), December is the coldest month. Weather in December »

How many days does it rain in Friday Harbor?

In Friday Harbor, during the entire year, the rain falls for 154 days and collects up to 28.2" (717.2mm) of precipitation.

When is the ocean coldest in Friday Harbor?

January and February, with an average ocean temperature of 45°F (7.2°C), are months with the coldest seawater in Friday Harbor, Washington. Swimming in 45°F (7.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

January, November and December, with an average of 2h of sunshine, are months with the least sunshine in Friday Harbor.

What are the months with the lowest UV index in Friday Harbor?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Friday Harbor, Washington.

When are the longest days in Friday Harbor?

June has the longest days of the year in Friday Harbor, with an average of 16.1h of daylight.

When is the highest UV index in Friday Harbor?

June and July, with an average maximum UV index of 7, are months with the highest UV index in Friday Harbor, Washington.

What is the warmest month in Friday Harbor?

Warmest months in Friday Harbor are July and August, with an average high-temperature of 71.1°F (21.7°C).

What is the driest month in Friday Harbor?

July is the month with the least rainfall. Rain falls for 6 days and accumulates 0.8" (20.3mm) of precipitation.

What month has the most sunshine in Friday Harbor?

July has the most sunshine of the year, with an average of 10h of sunshine.

When is the ocean warmest in Friday Harbor?

August and September, with an average ocean temperature of 52.3°F (11.3°C), are months with the warmest seawater in Friday Harbor. Swimming in 52.3°F (11.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the wettest month in Friday Harbor?

November is the month with the most rainfall in Friday Harbor. Rain falls for 18 days and accumulates 4.8" (122.4mm) of precipitation.

What is the coldest month in Friday Harbor?

The coldest month is December, with an average high-temperature of 46°F (7.8°C) and an average low-temperature of 34°F (1.1°C).

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

With an average of 8.4h of daylight, December has the shortest days of the year.
Average rainfall - Friday Harbor, WA
Average rainfall days - Friday Harbor, WA
Average sea temperature - Friday Harbor, WA

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).

Average daylight / Average sunshine - Friday Harbor, WA
Average UV index - Friday Harbor, WA