August weather forecastVashon, WA
August
Weather in August
The last month of the summer, August, is another warm month in Vashon, Washington, with an average temperature ranging between max 77.7°F (25.4°C) and min 53.6°F (12°C).Temperature
Vashon's August weather reaches an average high of 77.7°F (25.4°C) and an average low of 53.6°F (12°C), making it the warmest month.Humidity
The average relative humidity in August is 69%.Rainfall
In Vashon, in August, during 5.7 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In Vashon, during the entire year, the rain falls for 138.2 days and collects up to 14.09" (358mm) of precipitation.Snowfall
In Vashon, snow does not fall in April through October.Daylight
In August, the average length of the day is 14h and 11min.On the first day of August, sunrise is at 5:49 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:51 pm PDT.
Sunshine
With an average of 10.7h of sunshine, August has the most sunshine of the year in Vashon.UV index
June through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In August, the maximum UV index of 5 translates into these guidelines:
Take precautions - Protection against skin and eye damage is obliged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Vashon, WA
- Average high temperature in August: 77.7°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in August: 53.6°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in August
Vashon, WA
- Average pressure in August: 30.01"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).
Average wind speed in August
Vashon, WA
- Average wind speed in August: 3.6mph
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 (3.6mph).
Average humidity in August
Vashon, WA
- Average humidity in August: 69%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (68%).
Average rainfall in August
Vashon, WA
- Average rainfall in August: 0.47"
The wettest month (with the highest rainfall) is December (2.2").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in August
Vashon, WA
- Average rainfall days in August: 5.7 days
The month with the highest number of rainy days is April (14.9 days).
The month with the least rainy days is August (5.7 days).
Average snowfall in August
Vashon, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Vashon, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Vashon, WA
- Average daylight in August: 14h and 12min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 10h and 42min
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 6min).
Average sunshine days in August
Vashon, WA
- Average sunshine days in August: 22.8 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (13 days).
Average UV index in August
Vashon, WA
- Average UV index in August: 5
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Vashon, WA
- Average cloud cover in August: 26
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in August
Vashon, WA
- Average visibility in August: 6mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
