August weather forecastCoupeville, WA
August
Weather in August
August, the last month of the summer in Coupeville, is another refreshing month, with an average temperature fluctuating between 66°F (18.9°C) and 55.9°F (13.3°C).Temperature
Coupeville records an average high-temperature of a still refreshing 66°F (18.9°C) in August, maintaining a close correlation with July's 66.2°F (19°C). An average nighttime temperature of 55.9°F (13.3°C) is noted during the month of August.Humidity
In Coupeville, the average relative humidity in August is 78%.Rainfall
In Coupeville, in August, during 7.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Coupeville, during the entire year, the rain falls for 183.8 days and collects up to 24.45" (621mm) of precipitation.Snowfall
In Coupeville, Washington, snow does not fall in May through October.Ocean temperature
August and September, with an average ocean temperature of 53.1°F (11.7°C), are months with the warmest seawater.Note: Staying in 53.1°F (11.7°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.
Daylight
In Coupeville, the average length of the day in August is 14h and 15min.On the first day of the month, sunrise is at 5:47 am and sunset at 8:46 pm. On the last day of August, in Coupeville, sunrise is at 6:28 am and sunset at 7:53 pm PDT.
Sunshine
The month with the most sunshine is August, with an average of 11h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 4 during August translates into the following guidance:
Act with care - The need to guard against sun damage is communicated. To protect against the Sun's most potent rays, avoid direct exposure around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Coupeville, WA
- Average high temperature in August: 66°F
The warmest month (with the highest average high temperature) is July (66.2°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in August: 55.9°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is February (37.9°F).
Average pressure in August
Coupeville, WA
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in August
Coupeville, WA
- Average wind speed in August: 4.3mph
The windiest month (with the highest average wind speed) is November (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in August
Coupeville, WA
- Average humidity in August: 78%
The months with the highest relative humidity are January, February and March (81%).
The month with the lowest relative humidity is July (76%).
Average rainfall in August
Coupeville, WA
- Average rainfall in August: 0.71"
The wettest month (with the highest rainfall) is November (3.46").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in August
Coupeville, WA
- Average rainfall days in August: 7.5 days
The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is August (7.5 days).
Average snowfall in August
Coupeville, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Coupeville, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in August
Coupeville, 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
Coupeville, WA
- Average daylight in August: 14h and 18min
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 December (Average sunshine: 4h and 36min).
Average sunshine days in August
Coupeville, WA
- Average sunshine days in August: 21.7 days
The month with the most sunshine days is August (21.7 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in August
Coupeville, 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
Coupeville, WA
- Average cloud cover in August: 22
The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in August
Coupeville, 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).
