August weather forecastFriday Harbor, WA
August
Weather in August
August, the last month of the summer in Friday Harbor, is another refreshing month, with temperature in the range of an average high of 64.4°F (18°C) and an average low of 57.7°F (14.3°C).Temperature
August's onset brings an average high-temperature of a still refreshing 64.4°F (18°C), showing a minute difference from July's 64.9°F (18.3°C). During the month of August, Friday Harbor's average nighttime temperature closely mirrors its daytime counterpart, at a still refreshing 57.7°F (14.3°C).Humidity
The months with the highest humidity are January, August and September, with an average relative humidity of 79%.Rainfall
In Friday Harbor, in August, it is raining for 5.3 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 167.7 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Ocean temperature
August and September, with an average ocean temperature of 52.3°F (11.3°C), are months with the warmest seawater.Note: Navigating the 52.3°F (11.3°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
The average length of the day in August in Friday Harbor is 14h and 17min.On the first day of the month, sunrise is at 5:47 am and sunset at 8:48 pm. On the last day of August, sunrise is at 6:29 am and sunset at 7:55 pm PDT.
Sunshine
The average sunshine in August is 10.8h.UV index
In Friday Harbor, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 4 during August, leads to the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Friday Harbor, WA
- Average high temperature in August: 64.4°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 August: 57.7°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 August
Friday Harbor, WA
- Average pressure in August: 30.02"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 August
Friday Harbor, WA
- Average wind speed in August: 4.9mph
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 August
Friday Harbor, WA
- Average humidity in August: 79%
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 August
Friday Harbor, WA
- Average rainfall in August: 0.71"
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 August
Friday Harbor, WA
- Average rainfall days in August: 5.3 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 August
Friday Harbor, WA
- Average snowfall in August: 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 August
Friday Harbor, WA
- Average snowfall days in August: 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 August
Friday Harbor, WA
- Average sea temperature in August: 52.3°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 August /
Average sunshine in August
Friday Harbor, WA
- Average daylight in August: 14h and 18min
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 August: 10h and 48min
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 August
Friday Harbor, WA
- Average sunshine days in August: 24.7 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 August
Friday Harbor, 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
Friday Harbor, WA
- Average cloud cover in August: 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 August
Friday Harbor, 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).
