S
M
T
W
T
F
S
30
77°
43°
31
78°
46°
1
83°
48°
2
86°
53°
3
86°
51°
4
83°
44°
5
74°
42°
6
76°
45°
7
80°
47°
8
83°
45°
9
80°
47°
10
78°
41°
11
77°
41°
12
76°
44°
13
74°
40°
14
71°
38°
15
70°
37°
16
70°
36°
17
71°
37°
18
71°
38°
19
73°
41°
20
80°
43°
21
79°
40°
22
72°
38°
23
68°
36°
24
65°
35°
25
65°
33°
26
66°
34°
27
67°
34°
28
70°
39°
29
74°
38°
30
75°
39°
1
Hist. Avg.
68°
42°
2
Hist. Avg.
67°
41°
3
Hist. Avg.
66°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kettle Falls
Kettle Falls's September 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 33° and 53°. The average high for September is 75° with an average low of 41°. 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 Kettle Falls. See also: October | November | December.
