July weather forecast
Seattle, WA

Beautiful dusk skyline over the giant skyscrapers of Seattle, Washington
Beautiful dusk skyline over the giant skyscrapers of Seattle, Washington

Weather in July

July in Seattle, Washington, is a moderately hot summer month, with an average temperature ranging between min 52.3°F (11.3°C) and max 75.9°F (24.4°C).

Temperature

In Seattle, the average high-temperature in July slightly increases from a pleasant 69.1°F (20.6°C) in June to a moderately hot 75.9°F (24.4°C). The average low-temperature, in July, is 52.3°F (11.3°C).

Humidity

With an average relative humidity of 69%, July is the least humid month.

Rainfall

The months with the least rainfall in Seattle are July and August Rain falls for 4.2 days and accumulates 0.12" (3mm) of rain.

Snowfall

In Seattle, snow does not fall in April through October and December.

Ocean temperature

In Seattle, the average seawater temperature in July is 50.9°F (10.5°C).
Note: Swimming in 50.9°F (10.5°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.

Daylight

In July, the average length of the day is 15h and 31min.
On the first day of July in Seattle, sunrise is at 5:15 am and sunset at 9:10 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:45 pm PDT.

Sunshine

In Seattle, Washington, the average sunshine in July is 10.6h.

UV index

July is the month with the highest UV index in Seattle, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in July in Seattle?

The average high-temperature, in July, is 75.9°F (24.4°C), while the average low-temperature is 52.3°F (11.3°C).

What is the least humid month in Seattle?

July is the least humid month in Seattle, with an average relative humidity of 69%.

What is the average humidity in July in Seattle?

In Seattle, Washington, the average relative humidity in July is 69%.

What is the driest month in Seattle?

The months with the least rainfall in Seattle are July and August Rain falls for 4.2 days and accumulates 0.12" (3mm) of rain.

How much does it rain in Seattle in July?

In July, in Seattle, the rain falls for 4.2 days. Throughout July, 0.12" (3mm) of precipitation is accumulated.

When it does not snow in Seattle?

April through October and December are months without snowfall in Seattle.

What is the ocean temperature in July in Seattle?

In Seattle, in July, the average water temperature is 50.9°F (10.5°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.

How many hours of daylight does Seattle have in July?

In Seattle, Washington, the average day length in July is 15h and 31min.

When is the sunrise / sunset in July in Seattle?

On the first day of July in Seattle, Washington, sunrise is at 5:15 am and sunset at 9:10 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:45 pm PDT.

How long on average sun shines in July in Seattle?

In July, the average sunshine duration in Seattle, Washington, is 10.6h.

What is the month with the highest UV index in Seattle?

July is the month with the highest UV index in Seattle, with an average maximum UV index of 6.

How high is the UV index in July in Seattle?

The average daily maximum UV index in July in Seattle, Washington, is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Seattle, WA

Average temperature in July - Seattle, WA
  • Average high temperature in July: 75.9°F

The warmest month (with the highest average high temperature) is August (76.3°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in July: 52.3°F

The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (35.1°F).

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Average pressure in July
Seattle, WA

Average pressure in July - Seattle, WA
  • Average pressure in July: 30.03"Hg

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).

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Average wind speed in July
Seattle, WA

Average wind speed in July - Seattle, WA
  • Average wind speed in July: 3.5mph

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 (3.5mph).

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Average humidity in July
Seattle, WA

Average humidity in July - Seattle, WA
  • Average humidity in July: 69%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (69%).

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Average rainfall in July
Seattle, WA

Average rainfall in July - Seattle, WA
  • Average rainfall in July: 0.12"

The wettest month (with the highest rainfall) is December (0.87").
The driest months (with the least rainfall) are July and August (0.12").

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Average rainfall days in July
Seattle, WA

Average rainfall days in July - Seattle, WA
  • Average rainfall days in July: 4.2 days

The month with the highest number of rainy days is November (9.1 days).
The month with the least rainy days is August (2.8 days).

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Average snowfall in July
Seattle, WA

Average snowfall in July - Seattle, WA
  • Average snowfall in July: 0"

The month with the highest snowfall is February (0.71").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").

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Average snowfall days in July
Seattle, WA

Average snowfall days in July - Seattle, WA
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is February (1.9 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 in July
Seattle, WA

Average sea temperature in July - Seattle, WA
  • Average sea temperature in July: 50.8°F

The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).

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Average daylight in July /
Average sunshine in July
Seattle, WA

Average daylight in July / Average sunshine in July - Seattle, WA
  • Average daylight in July: 15h and 31min

The month with the longest days is June (Average daylight: 15h and 55min).
The month with the shortest days is December (Average daylight: 8h and 31min).

  • Average sunshine in July: 10h and 36min

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 18min).

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Average sunshine days in July
Seattle, WA

Average sunshine days in July - Seattle, WA
  • Average sunshine days in July: 25.8 days

The month with the most sunshine days is August (25.9 days).
The month with the least sunshine days is November (16.8 days).

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Average UV index in July
Seattle, WA

Average UV index in July - Seattle, WA
  • Average UV index in July: 6

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in July
Seattle, WA

Average cloud cover in July - Seattle, WA
  • Average cloud cover in July: 27

The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).

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Average visibility in July
Seattle, WA

Average visibility in July - Seattle, WA
  • Average visibility in July: 6mi

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

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