S
M
T
W
T
F
S
30
71°
45°
31
81°
45°
1
83°
57°
2
72°
53°
3
65°
50°
4
64°
48°
5
70°
43°
6
72°
46°
7
67°
51°
8
72°
52°
9
79°
48°
10
79°
55°
11
70°
45°
12
73°
51°
13
60°
46°
14
65°
45°
15
64°
47°
16
73°
47°
17
79°
47°
18
78°
49°
19
79°
46°
20
80°
49°
21
84°
49°
22
76°
42°
23
71°
41°
24
77°
51°
25
59°
39°
26
61°
37°
27
63°
35°
28
67°
38°
29
65°
40°
30
66°
39°
1
65°
37°
2
68°
35°
3
70°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Spokane Reservation
Spokane Reservation's September 2026 forecast shows daily high temperatures ranging from 59° to 77°, with overnight lows between 35° and 51°. The average high for September is 67° with an average low of 39°. 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 Spokane Reservation. See also: October | November | December.
