S
M
T
W
T
F
S
30
72°
50°
31
83°
45°
1
82°
50°
2
71°
54°
3
67°
53°
4
66°
46°
5
74°
42°
6
75°
45°
7
66°
53°
8
72°
53°
9
80°
48°
10
80°
54°
11
72°
49°
12
75°
50°
13
61°
48°
14
64°
46°
15
66°
43°
16
75°
46°
17
79°
49°
18
78°
47°
19
80°
48°
20
81°
50°
21
83°
53°
22
72°
46°
23
73°
49°
24
74°
47°
25
73°
49°
26
74°
50°
27
73°
49°
28
70°
44°
29
63°
42°
30
63°
38°
1
62°
37°
2
64°
38°
3
61°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Spokane
Spokane's September 2026 forecast shows daily high temperatures ranging from 61° to 83°, with overnight lows between 36° and 53°. The average high for September is 72° with an average low of 45°. 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. See also: October | November | December.
