Average Temperatures for Washington in August





Average temperatures for August at cities and other locations throughout Washington are listed below in degrees Fahrenheit and Celsius.

You can jump to a separate table for each region of the state: Olympic Peninsula & West Coast, San Juan Islands & Puget Sound, Cascade Mountains and Eastern Washington.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Olympic Peninsula & West Coast

Average August temperatures
High °F Low °F Place High °C Low °C
69 54 Aberdeen 21 12
73 50 Clearwater 23 10
74 51 Forks 23 10
73 50 Friday Harbor, San Juan Island 23 10
86 49 Grayland 30 10
67 52 Long Beach 19 11
67 55 Port Angeles 20 13

San Juan Islands, Puget Sound & South

Average daily temperatures in August
High °F Low °F Place High °C Low °C
75 54 Anacortes 24 12
73 55 Bellingham 23 13
77 55 Bremerton 25 13
78 53 Centralia 26 12
73 55 Everett 23 13
80 53 Longview 27 12
75 53 Mount Vernon 24 12
88 61 Oak Harbor, Whidbey Island 31 16
69 54 Olga, Orcas Island 21 12
78 51 Olympia 26 10
73 54 Port Townsend 23 12
78 57 Seattle 25 14
79 52 Shelton 26 11
77 57 Tacoma 25 14
79 52 Vancouver 26 11

Cascade Mountains

August temperatures: daily averages
High °F Low °F Place High °C Low °C
75 51 Baker Lake Dam 24 11
77 52 Baring 25 11
79 54 Darrington 26 12
84 49 Mt Adams Ranger Station 29 10
64 45 Mt Rainier Paradise Ranger Station 18 7
76 52 Mud Mountain Lake Dam 24 11
79 56 Ross Dam 26 13
69 51 Stampede Pass 21 11

Eastern Washington State

Average August temperatures
High °F Low °F Place High °C Low °C
85 50 Boundary Dam 29 10
87 58 Chelan 31 15
87 58 Coulee Dam 31 15
90 61 Kennewick 32 16
87 50 Leavenworth 31 10
88 56 Moses Lake 31 13
85 50 Pullman 30 10
84 57 Spokane 29 14
89 62 Walla Walla 31 17
70 54 Wenatchee 21 12
86 49 Winthrop 30 10
89 53 Yakima 31 12
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Washington Temperatures
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