S
M
T
W
T
F
S
30
56°
51°
31
56°
50°
1
54°
50°
2
63°
51°
3
55°
52°
4
56°
52°
5
57°
51°
6
55°
52°
7
55°
52°
8
58°
52°
9
57°
52°
10
64°
51°
11
55°
46°
12
60°
49°
13
54°
52°
14
58°
52°
15
57°
49°
16
56°
46°
17
53°
42°
18
54°
47°
19
53°
46°
20
48°
44°
21
46°
42°
22
53°
37°
23
50°
36°
24
51°
35°
25
52°
42°
26
52°
48°
27
52°
43°
28
53°
45°
29
50°
42°
30
49°
40°
1
45°
33°
2
55°
35°
3
52°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Old Harbor
Old Harbor'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 Old Harbor. See also: October | November | December.
