S
M
T
W
T
F
S
30
70°
62°
31
82°
66°
1
88°
56°
2
83°
56°
3
82°
54°
4
73°
62°
5
81°
55°
6
83°
54°
7
79°
57°
8
72°
59°
9
78°
55°
10
73°
47°
11
80°
48°
12
71°
49°
13
64°
36°
14
64°
31°
15
68°
41°
16
70°
40°
17
68°
53°
18
59°
50°
19
58°
51°
20
59°
41°
21
61°
42°
22
65°
33°
23
68°
33°
24
65°
48°
25
72°
44°
26
71°
44°
27
68°
36°
28
74°
46°
29
73°
46°
30
73°
58°
1
64°
40°
2
60°
31°
3
59°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Eagle River
Eagle River's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Eagle River. See also: October | November | December.