S
M
T
W
T
F
S
30
75°
50°
31
73°
51°
1
79°
46°
2
75°
56°
3
69°
44°
4
64°
45°
5
56°
45°
6
59°
47°
7
58°
48°
8
67°
49°
9
67°
49°
10
70°
53°
11
70°
48°
12
60°
46°
13
64°
49°
14
70°
51°
15
68°
40°
16
71°
47°
17
60°
46°
18
67°
42°
19
57°
39°
20
62°
41°
21
57°
39°
22
57°
42°
23
62°
37°
24
55°
35°
25
54°
32°
26
55°
42°
27
61°
41°
28
66°
42°
29
65°
41°
30
66°
42°
1
61°
41°
2
66°
41°
3
65°
40°
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 54° to 75°, with overnight lows between 32° and 56°. The average high for September is 63° with an average low of 44°. 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.
