S
M
T
W
T
F
S
30
76°
67°
31
87°
71°
1
87°
74°
2
94°
73°
3
N/A
4
85°
70°
5
78°
65°
6
77°
62°
7
77°
62°
8
80°
69°
9
88°
69°
10
79°
58°
11
72°
59°
12
79°
60°
13
79°
61°
14
78°
61°
15
78°
59°
16
79°
54°
17
79°
59°
18
71°
58°
19
78°
59°
20
78°
59°
21
77°
58°
22
77°
57°
23
74°
56°
24
71°
57°
25
76°
58°
26
74°
54°
27
66°
50°
28
65°
50°
29
66°
48°
30
65°
45°
1
63°
48°
2
64°
52°
3
69°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Oak Harbor
Oak Harbor's September 2026 forecast shows daily high temperatures ranging from 63° to 88°, with overnight lows between 45° and 70°. The average high for September is 75° with an average low of 58°. 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.
