S
M
T
W
T
F
S
30
81°
51°
31
84°
51°
1
79°
45°
2
73°
43°
3
74°
43°
4
78°
47°
5
80°
48°
6
72°
39°
7
71°
40°
8
75°
40°
9
80°
43°
10
82°
49°
11
82°
49°
12
81°
48°
13
79°
48°
14
75°
41°
15
77°
42°
16
76°
42°
17
78°
44°
18
82°
47°
19
81°
44°
20
80°
41°
21
76°
44°
22
78°
45°
23
80°
44°
24
79°
43°
25
77°
45°
26
78°
46°
27
79°
45°
28
79°
42°
29
70°
40°
30
68°
42°
1
67°
38°
2
63°
36°
3
61°
37°
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 61° to 84°, with overnight lows between 36° and 51°. The average high for September is 76° with an average low of 44°. 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.
