S
M
T
W
T
F
S
30
71°
49°
31
82°
43°
1
77°
55°
2
68°
49°
3
64°
51°
4
64°
48°
5
73°
44°
6
75°
45°
7
59°
51°
8
67°
50°
9
77°
44°
10
79°
54°
11
71°
48°
12
72°
52°
13
61°
48°
14
61°
46°
15
65°
48°
16
73°
49°
17
78°
51°
18
75°
48°
19
77°
49°
20
78°
49°
21
80°
52°
22
75°
49°
23
72°
47°
24
76°
49°
25
71°
48°
26
68°
46°
27
68°
45°
28
64°
46°
29
67°
45°
30
65°
43°
1
56°
37°
2
70°
47°
3
65°
45°
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 56° to 80°, with overnight lows between 37° and 52°. The average high for September is 70° with an average low of 47°. 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.
