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
82°
57°
14
82°
56°
15
82°
55°
16
81°
56°
17
82°
53°
18
79°
55°
19
77°
56°
20
76°
55°
21
77°
55°
22
79°
57°
23
82°
55°
24
81°
56°
25
80°
56°
26
76°
53°
27
79°
57°
28
70°
51°
29
70°
49°
30
72°
48°
31
77°
51°
1
78°
53°
2
78°
53°
3
77°
54°
4
77°
55°
5
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Federal Way
Federal Way's August 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 48° and 57°. The average high for August is 78° with an average low of 54°. 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 Federal Way. See also: September | October | November.