S
M
T
W
T
F
S
30
72°
51°
31
72°
55°
1
73°
56°
2
75°
57°
3
80°
51°
4
80°
56°
5
78°
49°
6
70°
50°
7
78°
55°
8
70°
48°
9
68°
51°
10
71°
55°
11
67°
50°
12
68°
53°
13
68°
53°
14
67°
48°
15
65°
45°
16
66°
45°
17
66°
48°
18
Hist. Avg.
71°
53°
19
Hist. Avg.
71°
53°
20
Hist. Avg.
70°
53°
21
Hist. Avg.
70°
53°
22
Hist. Avg.
70°
52°
23
Hist. Avg.
69°
52°
24
Hist. Avg.
69°
52°
25
Hist. Avg.
69°
52°
26
Hist. Avg.
68°
52°
27
Hist. Avg.
68°
51°
28
Hist. Avg.
68°
51°
29
Hist. Avg.
67°
51°
30
Hist. Avg.
67°
51°
1
Hist. Avg.
66°
50°
2
Hist. Avg.
66°
50°
3
Hist. Avg.
65°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Federal Way
Federal Way's September 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 45° and 57°. The average high for September is 71° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Federal Way. See also: October | November | December.
