S
M
T
W
T
F
S
30
72°
43°
31
70°
43°
1
72°
44°
2
80°
42°
3
81°
46°
4
80°
49°
5
77°
47°
6
70°
41°
7
73°
47°
8
74°
42°
9
67°
44°
10
65°
43°
11
66°
44°
12
66°
41°
13
67°
38°
14
66°
44°
15
69°
46°
16
65°
39°
17
68°
37°
18
68°
42°
19
72°
45°
20
71°
45°
21
63°
35°
22
62°
39°
23
61°
40°
24
60°
34°
25
59°
34°
26
60°
36°
27
63°
42°
28
60°
37°
29
59°
34°
30
60°
39°
1
63°
41°
2
63°
38°
3
57°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sunnybrae
Sunnybrae's September 2026 forecast shows daily high temperatures ranging from 57° to 81°, with overnight lows between 34° and 49°. The average high for September is 67° with an average low of 41°. 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 Sunnybrae. See also: October | November | December.