S
M
T
W
T
F
S
26
73°
56°
27
74°
56°
28
73°
58°
29
76°
64°
30
82°
64°
31
85°
63°
1
82°
59°
2
80°
62°
3
79°
64°
4
80°
64°
5
81°
63°
6
82°
61°
7
83°
60°
8
82°
54°
9
75°
55°
10
74°
54°
11
78°
57°
12
76°
53°
13
74°
54°
14
77°
62°
15
82°
63°
16
84°
65°
17
84°
57°
18
80°
55°
19
81°
55°
20
78°
57°
21
74°
64°
22
81°
59°
23
83°
56°
24
82°
57°
25
81°
61°
26
80°
61°
27
72°
58°
28
68°
53°
29
72°
55°
30
72°
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 68° to 85°, with overnight lows between 53° and 65°. The average high for August is 78° with an average low of 59°. 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.
