S
M
T
W
T
F
S
26
74°
59°
27
79°
59°
28
73°
58°
29
75°
56°
30
79°
54°
31
84°
56°
1
72°
58°
2
71°
56°
3
76°
53°
4
81°
58°
5
87°
59°
6
88°
59°
7
86°
59°
8
83°
58°
9
77°
55°
10
74°
55°
11
79°
55°
12
79°
58°
13
81°
56°
14
78°
56°
15
75°
57°
16
75°
58°
17
80°
54°
18
80°
57°
19
83°
55°
20
86°
59°
21
81°
60°
22
76°
59°
23
75°
59°
24
81°
57°
25
84°
59°
26
77°
58°
27
74°
59°
28
73°
57°
29
71°
55°
30
71°
55°
31
76°
54°
1
66°
57°
2
70°
55°
3
68°
53°
4
70°
53°
5
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Seattle
Seattle's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
