S
M
T
W
T
F
S
30
77°
59°
31
78°
58°
1
77°
55°
2
71°
51°
3
70°
51°
4
70°
52°
5
71°
50°
6
76°
58°
7
78°
58°
8
78°
57°
9
77°
58°
10
78°
58°
11
77°
57°
12
78°
57°
13
78°
59°
14
78°
51°
15
66°
50°
16
65°
49°
17
67°
48°
18
65°
48°
19
66°
44°
20
65°
46°
21
73°
49°
22
74°
50°
23
74°
43°
24
71°
43°
25
66°
44°
26
68°
50°
27
70°
51°
28
71°
49°
29
64°
40°
30
62°
40°
1
62°
46°
2
67°
42°
3
70°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cairnbrook
Cairnbrook's September 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 40° and 59°. The average high for September is 71° with an average low of 51°. 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 Cairnbrook. See also: October | November | December.
