S
M
T
W
T
F
S
30
64°
48°
31
72°
50°
1
80°
53°
2
76°
50°
3
67°
47°
4
63°
44°
5
57°
47°
6
60°
45°
7
66°
45°
8
63°
44°
9
61°
43°
10
76°
47°
11
62°
44°
12
60°
40°
13
59°
41°
14
58°
38°
15
63°
44°
16
60°
44°
17
60°
43°
18
57°
41°
19
55°
38°
20
55°
35°
21
56°
33°
22
56°
35°
23
55°
35°
24
64°
37°
25
66°
41°
26
65°
44°
27
62°
42°
28
55°
39°
29
54°
36°
30
52°
36°
1
52°
37°
2
56°
37°
3
52°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calgary
Calgary's September 2026 forecast shows daily high temperatures ranging from 52° to 80°, with overnight lows between 32° and 53°. The average high for September is 61° with an average low of 42°. 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 Calgary. See also: October | November | December.
