average temperature city seattle
Average monthly weather in Seattle, United States of America. 1  Seattle experienes warm summers and mild winters. Most rain in Seattle is seen in winter and on an annual base the city experiences a large amount of rainfall making it one of the wettest cities in the country. Winters in Seattle have an average temperature of aounrd 5 to 8 degrees Celsius (41-46Â° Fahrenheit), so snowfall is rare. Summers have an average temperature of 16 to 19 degrees Celsius (60-66 Â° Fahrenheit).