S
M
T
W
T
F
S
30
87°
58°
31
86°
48°
1
74°
47°
2
73°
47°
3
82°
52°
4
83°
54°
5
84°
48°
6
78°
45°
7
70°
45°
8
70°
49°
9
67°
52°
10
69°
54°
11
69°
43°
12
68°
45°
13
68°
54°
14
75°
51°
15
68°
48°
16
67°
41°
17
66°
42°
18
68°
45°
19
72°
45°
20
73°
46°
21
70°
45°
22
67°
40°
23
64°
43°
24
64°
50°
25
68°
41°
26
63°
38°
27
62°
46°
28
63°
41°
29
62°
47°
30
68°
44°
1
61°
39°
2
63°
42°
3
66°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coeur d'Alene
Coeur d'Alene's September 2026 forecast shows daily high temperatures ranging from 61° to 87°, with overnight lows between 38° and 58°. The average high for September is 70° with an average low of 46°. 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 Coeur d'Alene. See also: October | November | December.
