S
M
T
W
T
F
S
26
73°
56°
27
78°
55°
28
77°
55°
29
78°
54°
30
76°
55°
31
74°
55°
1
74°
56°
2
75°
55°
3
74°
59°
4
72°
57°
5
74°
55°
6
78°
59°
7
79°
58°
8
77°
53°
9
82°
54°
10
73°
56°
11
73°
62°
12
Hist. Avg.
78°
58°
13
Hist. Avg.
78°
58°
14
Hist. Avg.
78°
58°
15
Hist. Avg.
78°
57°
16
Hist. Avg.
78°
57°
17
Hist. Avg.
78°
57°
18
Hist. Avg.
78°
57°
19
Hist. Avg.
77°
57°
20
Hist. Avg.
77°
57°
21
Hist. Avg.
77°
57°
22
Hist. Avg.
77°
57°
23
Hist. Avg.
77°
57°
24
Hist. Avg.
77°
57°
25
Hist. Avg.
77°
57°
26
Hist. Avg.
76°
56°
27
Hist. Avg.
76°
56°
28
Hist. Avg.
76°
56°
29
Hist. Avg.
76°
56°
30
Hist. Avg.
76°
56°
31
Hist. Avg.
76°
56°
1
Hist. Avg.
75°
56°
2
Hist. Avg.
75°
56°
3
Hist. Avg.
75°
56°
4
Hist. Avg.
75°
56°
5
Hist. Avg.
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Seattle
Seattle's August 2026 forecast shows daily high temperatures ranging from 72° to 82°, with overnight lows between 53° and 62°. The average high for August is 76° with an average low of 56°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Seattle. See also: September | October | November.
