S
M
T
W
T
F
S
30
79°
58°
31
80°
57°
1
78°
56°
2
78°
57°
3
79°
58°
4
80°
57°
5
79°
56°
6
78°
57°
7
79°
55°
8
75°
53°
9
75°
53°
10
76°
52°
11
78°
53°
12
73°
51°
13
65°
45°
14
63°
44°
15
63°
49°
16
65°
49°
17
64°
43°
18
71°
47°
19
72°
50°
20
73°
50°
21
72°
49°
22
68°
38°
23
71°
40°
24
69°
47°
25
68°
49°
26
66°
39°
27
70°
34°
28
60°
35°
29
64°
44°
30
64°
42°
1
58°
41°
2
57°
46°
3
62°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Birchwood
Birchwood's September 2026 forecast shows daily high temperatures ranging from 57° to 80°, with overnight lows between 34° and 58°. The average high for September is 71° with an average low of 49°. 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 Birchwood. See also: October | November | December.