Seattle
Washington, USA
Long-term weather forecast
Long-term weather forecast
Advertisement

August weather forecast and Climate
Seattle, WA

Advertisement
Beautiful dusk skyline over the giant skyscrapers of Seattle, Washington
Beautiful dusk skyline over the giant skyscrapers of Seattle, Washington
August remains moderately warm and pleasant with the temperatures in the range of 55.4°F (13°C) and 73.4°F (23°C), but witnesses a significant rise in humidity to 68%. This weather is the best for all outdoor activities as it remains moderately rainy with only six days of rainfall all August to collect only 1.3" (33mm) of precipitation.
The ocean temperatures remain steady at 57.2°F (14°C) making the waters inviting for a swim and later on a bask in the nine hours of warm sunshine. Night temperatures remain tolerable, and most visitors enjoy the night festivals like the Seattle International Beerfest.
Advertisement
  • The average high temperature in August: 24.6°C

The warmest month (with the highest average high temperature) is August (24.6°C).
The month with the lowest average high temperature is December (7.6°C).

  • The average low temperature in August: 13.3°C

The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is December (2°C).

Advertisement
  • The average humidity in August: 68.2%

The month with the highest relative humidity is December (80.1%).
The month with the lowest relative humidity is July (65.4%).

  • The average rainfall in August: 22.4mm

The wettest month (with the highest rainfall) is November (166.9mm).
The driest month (with the lowest rainfall) is July (17.8mm).

  • The average rainfall days in August: 4.8 days

The month with the highest number of rainy days is November (18.4 days).
The month with the lowest number of rainy days is August (4.8 days).

  • The average snowfall in August: 0mm

Months with the highest snowfall are February and December (43.2mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

  • The average snowfall days in August: 0 days

The month with the highest number of snowfall days is December (1.6 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

  • The average sea temperature in August: 12°C

The best month for swimming (with the highest average sea temperature) is August (12°C).
The coldest month (with the lowest average sea temperature) is February (7.4°C).

  • The average daylight in August: 14h

Months with the longest days are June and July (Average daylight: 16h).
The month with shortest days is December (Average daylight: 8h).

  • The average sunshine in August: 9.1h

The month with most sunshine is July (Average sunshine: 10.1h).
The month with least sunshine is December (Average sunshine: 1.7h).

  • The average UV index in August: 6

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).

deutscheenglishespañolрусский中文
Advertisement
Advertisement