S
M
T
W
T
F
S
30
65°
41°
31
64°
39°
1
65°
46°
2
71°
47°
3
75°
51°
4
74°
43°
5
70°
37°
6
64°
38°
7
63°
41°
8
66°
45°
9
70°
44°
10
72°
42°
11
67°
41°
12
62°
42°
13
67°
35°
14
63°
34°
15
58°
32°
16
57°
32°
17
58°
37°
18
59°
41°
19
65°
44°
20
70°
37°
21
63°
33°
22
57°
31°
23
55°
31°
24
54°
32°
25
55°
31°
26
56°
33°
27
56°
38°
28
59°
40°
29
68°
41°
30
60°
28°
1
53°
30°
2
Hist. Avg.
59°
28°
3
Hist. Avg.
59°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Carstairs
Carstairs's September 2026 forecast shows daily high temperatures ranging from 53° to 75°, with overnight lows between 28° and 51°. The average high for September is 63° with an average low of 38°. 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 Carstairs. See also: October | November | December.
