S
M
T
W
T
F
S
30
85°
57°
31
76°
57°
1
82°
56°
2
83°
56°
3
82°
55°
4
80°
54°
5
82°
53°
6
82°
55°
7
80°
47°
8
72°
41°
9
72°
44°
10
74°
45°
11
75°
42°
12
76°
43°
13
74°
46°
14
78°
49°
15
83°
46°
16
83°
53°
17
82°
52°
18
82°
53°
19
81°
51°
20
81°
55°
21
83°
47°
22
78°
48°
23
78°
47°
24
69°
43°
25
72°
44°
26
74°
41°
27
73°
46°
28
72°
43°
29
67°
47°
30
74°
41°
1
69°
46°
2
72°
44°
3
76°
45°
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 67° to 85°, with overnight lows between 41° and 57°. The average high for September is 77° with an average low of 48°. 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.
