S
M
T
W
T
F
S
30
65°
40°
31
65°
43°
1
66°
45°
2
65°
44°
3
69°
50°
4
73°
52°
5
73°
42°
6
70°
41°
7
62°
40°
8
61°
41°
9
62°
45°
10
63°
46°
11
62°
44°
12
65°
38°
13
67°
47°
14
61°
37°
15
59°
38°
16
Hist. Avg.
63°
41°
17
Hist. Avg.
63°
41°
18
Hist. Avg.
62°
41°
19
Hist. Avg.
62°
40°
20
Hist. Avg.
62°
40°
21
Hist. Avg.
61°
40°
22
Hist. Avg.
61°
39°
23
Hist. Avg.
61°
39°
24
Hist. Avg.
60°
39°
25
Hist. Avg.
60°
39°
26
Hist. Avg.
60°
38°
27
Hist. Avg.
59°
38°
28
Hist. Avg.
59°
38°
29
Hist. Avg.
59°
37°
30
Hist. Avg.
58°
37°
1
Hist. Avg.
58°
37°
2
Hist. Avg.
58°
36°
3
Hist. Avg.
57°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Birch Bay
Birch Bay's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 37° and 52°. The average high for September is 65° with an average low of 43°. 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 Birch Bay. See also: October | November | December.
