S
M
T
W
T
F
S
26
74°
55°
27
74°
54°
28
78°
55°
29
78°
54°
30
82°
57°
31
81°
54°
1
77°
55°
2
82°
54°
3
82°
57°
4
80°
53°
5
73°
55°
6
75°
54°
7
73°
54°
8
74°
61°
9
80°
63°
10
83°
57°
11
84°
54°
12
82°
58°
13
79°
56°
14
73°
56°
15
73°
52°
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 73° to 84°, with overnight lows between 52° and 63°. The average high for August is 78° 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.
