S
M
T
W
T
F
S
30
58°
42°
31
59°
43°
1
58°
40°
2
59°
42°
3
56°
43°
4
57°
39°
5
58°
38°
6
54°
38°
7
55°
40°
8
57°
41°
9
56°
41°
10
54°
40°
11
55°
40°
12
56°
41°
13
56°
40°
14
55°
40°
15
54°
39°
16
54°
40°
17
53°
40°
18
55°
39°
19
55°
38°
20
53°
39°
21
54°
38°
22
53°
37°
23
53°
37°
24
52°
36°
25
51°
35°
26
49°
33°
27
48°
32°
28
47°
35°
29
48°
33°
30
50°
30°
1
47°
33°
2
46°
33°
3
47°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Larsen Bay
Larsen Bay's September 2026 forecast shows daily high temperatures ranging from 46° to 59°, with overnight lows between 30° and 43°. The average high for September is 53° with an average low of 38°. 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 Larsen Bay. See also: October | November | December.