S
M
T
W
T
F
S
30
67°
51°
31
65°
49°
1
65°
48°
2
70°
58°
3
67°
49°
4
62°
47°
5
66°
49°
6
67°
46°
7
69°
52°
8
65°
47°
9
66°
48°
10
64°
50°
11
67°
49°
12
61°
50°
13
65°
53°
14
64°
53°
15
65°
49°
16
67°
51°
17
67°
49°
18
66°
52°
19
62°
50°
20
65°
52°
21
63°
51°
22
64°
50°
23
63°
49°
24
62°
52°
25
63°
51°
26
65°
52°
27
65°
53°
28
64°
49°
29
60°
49°
30
59°
47°
1
59°
47°
2
60°
48°
3
58°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oak Harbor
Oak Harbor's September 2026 forecast shows daily high temperatures ranging from 58° to 67°, with overnight lows between 44° and 53°. The average high for September is 63° with an average low of 50°. 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 Oak Harbor. See also: October | November | December.
