S
M
T
W
T
F
S
30
93°
72°
31
92°
72°
1
91°
71°
2
93°
72°
3
93°
72°
4
94°
71°
5
92°
71°
6
92°
70°
7
91°
71°
8
92°
70°
9
93°
71°
10
93°
71°
11
92°
70°
12
93°
71°
13
92°
69°
14
91°
67°
15
91°
68°
16
92°
68°
17
93°
69°
18
91°
63°
19
88°
60°
20
83°
60°
21
84°
61°
22
85°
64°
23
88°
65°
24
88°
63°
25
87°
64°
26
88°
63°
27
85°
63°
28
84°
61°
29
83°
61°
30
83°
62°
1
86°
61°
2
86°
60°
3
85°
60°
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 83° to 94°, with overnight lows between 60° and 72°. The average high for September is 89° with an average low of 66°. 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.
