S
M
T
W
T
F
S
30
71°
52°
31
74°
56°
1
70°
57°
2
70°
51°
3
71°
51°
4
74°
55°
5
69°
51°
6
69°
50°
7
70°
50°
8
73°
51°
9
77°
54°
10
78°
58°
11
77°
55°
12
77°
58°
13
78°
57°
14
73°
49°
15
72°
50°
16
72°
55°
17
76°
57°
18
77°
53°
19
76°
56°
20
75°
55°
21
68°
56°
22
74°
57°
23
75°
54°
24
73°
55°
25
72°
58°
26
74°
57°
27
74°
56°
28
64°
53°
29
62°
51°
30
63°
52°
1
62°
50°
2
60°
46°
3
59°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tukwila
Tukwila's September 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 46° and 58°. The average high for September is 71° 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 September weather will actually feel in Tukwila. See also: October | November | December.
