S
M
T
W
T
F
S
30
93°
56°
31
92°
46°
1
80°
45°
2
79°
46°
3
88°
51°
4
89°
52°
5
90°
45°
6
83°
42°
7
76°
42°
8
75°
47°
9
73°
48°
10
74°
51°
11
75°
40°
12
74°
44°
13
74°
50°
14
80°
47°
15
74°
44°
16
73°
40°
17
72°
39°
18
73°
42°
19
77°
41°
20
78°
42°
21
76°
39°
22
71°
36°
23
69°
38°
24
70°
46°
25
72°
38°
26
69°
35°
27
68°
40°
28
69°
38°
29
68°
43°
30
72°
39°
1
66°
37°
2
69°
39°
3
72°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fort Spokane
Fort Spokane's September 2026 forecast shows daily high temperatures ranging from 66° to 93°, with overnight lows between 35° and 56°. The average high for September is 76° with an average low of 43°. 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 Fort Spokane. See also: October | November | December.
