August weather forecast
Port Townsend, WA

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Victorian design houses from an old age along the beach on a hilly spot overlooking the sea, in Port Townsend, Washington
Victorian design houses from an old age along the beach on a hilly spot overlooking the sea, in Port Townsend, Washington

Weather in August

August maintains the summer heat with average highs mirroring July at 67.8°F (19.9°C). Despite being the tail end of summer, the weather continues to be favourably warm. Rainfall increases modestly from July, observed as a gentle nudge towards autumn. Despite its end-of-summer position, August manages to extend the sunny, dry and pleasant weather that locals and tourists relish.

Temperature

Port Townsend, Washington, notes the warmest temperatures in August, with a high average of 67.8°F (19.9°C) and a low of 55.4°F (13°C).

Humidity

The average relative humidity in August is 76%.

Rainfall

In Port Townsend, in August, during 6.6 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Port Townsend, Washington, during the entire year, the rain falls for 180.3 days and collects up to 21.85" (555mm) of precipitation.

Snowfall

May through October are months without snowfall.

Ocean temperature

August and September, with an average ocean temperature of 53.1°F (11.7°C), are months with the warmest seawater.
Note: Beware of 53.1°F (11.7°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.

Daylight

In August, the average length of the day is 14h and 14min.
On the first day of the month, sunrise is at 5:48 am and sunset at 8:46 pm. On the last day of August, in Port Townsend, sunrise is at 6:28 am and sunset at 7:53 pm PDT.

Sunshine

With an average of 11h of sunshine, August has the most sunshine of the year.

UV index

In August, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 4 in August interprets into the following advice:
Heed the precautions - Suggestions to avoid sunburn are made. When the Sun is at its strongest around midday, find shade and limit exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the hottest?

The temperatures reach their highest averages in August, with highs of 67.8°F (19.9°C) and lows of 55.4°F (13°C).

What is the temperature in August?

August temperatures vary between a high-temperature of 67.8°F (19.9°C) and a low-temperature of 55.4°F (13°C).

What is the average humidity in August?

In August, the average relative humidity is 76%.

How much does it rain in August?

In Port Townsend, during August, the rain falls for 6.6 days and regularly aggregates up to 0.63" (16mm) of precipitation.

When it does not snow?

May through October are months without snowfall in Port Townsend.

What are the months with the warmest ocean?

August and September, with an average ocean temperature of 53.1°F (11.7°C), are months with the warmest seawater.

What is the ocean temperature in August?

In Port Townsend, in August, the average water temperature is 53.1°F (11.7°C). Swimming in 53.1°F (11.7°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.

How many hours of daylight does Port Townsend have in August?

In Port Townsend, the average day length in August is 14h and 14min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 5:48 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:53 pm PDT.

What month has the most sunshine?

The month with the most sunshine is August, with an average of 11h of sunshine.

How many hours of sunshine does Port Townsend have in August?

In Port Townsend, the average sunshine duration in August is 11h.

How high is the UV index in August?

In August, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
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 August
Port Townsend, WA

Average temperature in August - Port Townsend, WA
  • Average high temperature in August: 67.8°F

The warmest month (with the highest average high temperature) is August (67.8°F).
The month with the lowest average high temperature is December (43°F).

  • Average low temperature in August: 55.4°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is February (37.4°F).

Average pressure in August
Port Townsend, WA

Average pressure in August - Port Townsend, WA
  • Average pressure in August: 30.02"Hg

The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.01"Hg).

Average wind speed in August
Port Townsend, WA

Average wind speed in August - Port Townsend, WA
  • Average wind speed in August: 4mph

The windiest month (with the highest average wind speed) is November (7.4mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity in August
Port Townsend, WA

Average humidity in August - Port Townsend, WA
  • Average humidity in August: 76%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (75%).

Average rainfall in August
Port Townsend, WA

Average rainfall in August - Port Townsend, WA
  • Average rainfall in August: 0.63"

The wettest month (with the highest rainfall) is November (2.91").
The driest month (with the least rainfall) is July (0.43").

Average rainfall days in August
Port Townsend, WA

Average rainfall days in August - Port Townsend, WA
  • Average rainfall days in August: 6.6 days

The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is August (6.6 days).

Average snowfall in August
Port Townsend, WA

Average snowfall in August - Port Townsend, WA
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Port Townsend, WA

Average snowfall days in August - Port Townsend, WA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in August
Port Townsend, WA

Average sea temperature in August - Port Townsend, WA
  • Average sea temperature in August: 53°F

The best month for swimming (with the highest average sea temperature) is August (53°F).
The coldest month (with the lowest average sea temperature) is February (45°F).

Average daylight in August /
Average sunshine in August
Port Townsend, WA

Average daylight in August / Average sunshine in August - Port Townsend, WA
  • Average daylight in August: 14h and 1min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in August: 11h and 0min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in August
Port Townsend, WA

Average sunshine days in August - Port Townsend, WA
  • Average sunshine days in August: 22.3 days

The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is March (8.2 days).

Average UV index in August
Port Townsend, WA

Average UV index in August - Port Townsend, WA
  • Average UV index in August: 4

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 August
Port Townsend, WA

Average cloud cover in August - Port Townsend, WA
  • Average cloud cover in August: 21

The months with the most cloud cover are January, February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in August
Port Townsend, WA

Average visibility in August - Port Townsend, WA
  • Average visibility in August: 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).

Port Townsend, Washington, USA

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