S
M
T
W
T
F
S
30
80°
59°
31
79°
59°
1
78°
54°
2
78°
54°
3
77°
51°
4
79°
51°
5
77°
49°
6
68°
48°
7
67°
51°
8
67°
57°
9
66°
53°
10
67°
52°
11
67°
46°
12
65°
51°
13
66°
56°
14
66°
51°
15
65°
49°
16
64°
48°
17
66°
49°
18
69°
51°
19
74°
49°
20
73°
49°
21
71°
45°
22
63°
44°
23
63°
47°
24
64°
46°
25
62°
45°
26
62°
46°
27
63°
47°
28
62°
48°
29
61°
46°
30
61°
46°
1
62°
49°
2
65°
52°
3
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in McChord Air Force Base
McChord Air Force Base's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 44° and 59°. The average high for September is 68° with an average low of 50°. 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 McChord Air Force Base. See also: October | November | December.
