S
M
T
W
T
F
S
30
61°
48°
31
65°
47°
1
63°
50°
2
59°
50°
3
59°
49°
4
60°
47°
5
58°
46°
6
58°
45°
7
59°
44°
8
58°
44°
9
58°
45°
10
59°
46°
11
58°
47°
12
57°
46°
13
56°
43°
14
56°
43°
15
58°
47°
16
57°
47°
17
61°
49°
18
59°
49°
19
60°
48°
20
61°
49°
21
60°
47°
22
59°
45°
23
55°
44°
24
54°
44°
25
54°
42°
26
55°
41°
27
53°
41°
28
53°
42°
29
54°
41°
30
52°
38°
1
53°
45°
2
57°
45°
3
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thorne Bay
Thorne Bay's September 2026 forecast shows daily high temperatures ranging from 52° to 65°, with overnight lows between 38° and 50°. The average high for September is 58° with an average low of 45°. 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 Thorne Bay. See also: October | November | December.
