July weather forecast
Friday Harbor, WA

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Weather in July

July, the same as June, is another refreshing summer month in Friday Harbor, Washington, with an average temperature fluctuating between 57.2°F (14°C) and 64.9°F (18.3°C).

Temperature

July stands out as Friday Harbor's warmest month, with temperatures ranging between an average high of 64.9°F (18.3°C) and a low of 57.2°F (14°C).

Humidity

In July, the average relative humidity is 77%.

Rainfall

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

Snowfall

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

Ocean temperature

In Friday Harbor, in July, the average water temperature is 50.2°F (10.1°C).
Note: With an efficient thermal swimsuit, one can navigate 50.2°F (10.1°C) even if it's colder than 50°F (10°C); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 55.4°F (13°C) feels chilly.

Daylight

The average length of the day in July is 15h and 39min.
On the first day of the month, sunrise is at 5:14 am and sunset at 9:17 pm. On the last day of July, sunrise is at 5:46 am and sunset at 8:50 pm PDT.

Sunshine

July has the most sunshine of the year, with an average of 11.1h of sunshine.

UV index

July is the month with the highest UV index, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 5 in July translates into these instructions:
Adopt protective measures - It is advised to guard against sun damage. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Updated: Jun 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the warmest month?

In Friday Harbor, temperatures reach their average annual highs in July, measuring 64.9°F (18.3°C) and a minimum average of 57.2°F (14°C).

What are July temperatures?

During July, Friday Harbor experiences an average high-temperature of 64.9°F (18.3°C) and a low-temperature of 57.2°F (14°C).

What is the average humidity in July?

In July, the average relative humidity is 77%.

What is the driest month?

July is the month with the least rainfall. Rain falls for 6.1 days and accumulates 0.43" (11mm) of precipitation.

How many days does it rain in July?

In Friday Harbor, in July, during 6.1 rainfall days, 0.43" (11mm) of precipitation is typically accumulated.

When it does not snow?

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

How cold is the water in July?

In Friday Harbor, the average seawater temperature in July is 50.2°F (10.1°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the average length of the day in July?

In July, the average day length is 15h and 39min.

When is the sunrise / sunset in July in Friday Harbor?

In July, on the first day of the month, sunrise is at 5:14 am and sunset at 9:17 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 8:50 pm PDT.

What month has the most sunshine?

With an average of 11.1h of sunshine, July has the most sunshine of the year.

How long on average sun shines in July?

In Friday Harbor, the average sunshine duration in July is 11.1h.

What is the month with the highest UV index?

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

What is the UV index reading in July?

The average daily maximum UV index in July is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Friday Harbor, WA

Average temperature in July - Friday Harbor, WA
  • Average high temperature in July: 64.9°F

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).

  • Average low temperature in July: 57.2°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).

Average pressure in July
Friday Harbor, WA

Average pressure in July - Friday Harbor, WA
  • Average pressure in July: 30.05"Hg

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

Average wind speed in July
Friday Harbor, WA

Average wind speed in July - Friday Harbor, WA
  • Average wind speed in July: 5.7mph

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).

Average humidity in July
Friday Harbor, WA

Average humidity in July - Friday Harbor, WA
  • Average humidity in July: 77%

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

Average rainfall in July
Friday Harbor, WA

Average rainfall in July - Friday Harbor, WA
  • Average rainfall in July: 0.43"

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

Average rainfall days in July
Friday Harbor, WA

Average rainfall days in July - Friday Harbor, WA
  • Average rainfall days in July: 6.1 days

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).

Average snowfall in July
Friday Harbor, WA

Average snowfall in July - Friday Harbor, WA
  • Average snowfall in July: 0"

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").

Average snowfall days in July
Friday Harbor, WA

Average snowfall days in July - Friday Harbor, WA
  • Average snowfall days in July: 0 days

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).

Average sea temperature in July
Friday Harbor, WA

Average sea temperature in July - Friday Harbor, WA
  • Average sea temperature in July: 50.2°F

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).

Average daylight in July /
Average sunshine in July
Friday Harbor, WA

Average daylight in July / Average sunshine in July - Friday Harbor, WA
  • Average daylight in July: 15h and 4min

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).

  • Average sunshine in July: 11h and 1min

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).

Average sunshine days in July
Friday Harbor, WA

Average sunshine days in July - Friday Harbor, WA
  • Average sunshine days in July: 24.3 days

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

Average UV index in July
Friday Harbor, WA

Average UV index in July - Friday Harbor, WA
  • Average UV index in July: 5

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).

Average cloud cover in July
Friday Harbor, WA

Average cloud cover in July - Friday Harbor, WA
  • Average cloud cover in July: 23

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).

Average visibility in July
Friday Harbor, WA

Average visibility in July - Friday Harbor, WA
  • Average visibility in July: 6mi

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).

Friday Harbor, Washington, USA

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