S
M
T
W
T
F
S
30
80°
59°
31
82°
59°
1
81°
52°
2
78°
51°
3
73°
53°
4
77°
58°
5
78°
60°
6
79°
53°
7
78°
50°
8
73°
54°
9
73°
58°
10
71°
58°
11
77°
57°
12
75°
55°
13
70°
55°
14
68°
51°
15
69°
48°
16
68°
47°
17
68°
52°
18
69°
48°
19
70°
53°
20
69°
55°
21
72°
52°
22
70°
45°
23
66°
50°
24
65°
53°
25
67°
46°
26
67°
43°
27
Hist. Avg.
69°
47°
28
Hist. Avg.
68°
47°
29
Hist. Avg.
68°
46°
30
Hist. Avg.
67°
46°
1
Hist. Avg.
67°
46°
2
Hist. Avg.
66°
45°
3
Hist. Avg.
66°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Bear Island
Bear Island's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 43° and 60°. The average high for September is 73° with an average low of 53°. 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 Bear Island. See also: October | November | December.