S
M
T
W
T
F
S
30
75°
50°
31
73°
51°
1
79°
46°
2
75°
54°
3
67°
53°
4
61°
46°
5
51°
47°
6
59°
48°
7
60°
51°
8
69°
52°
9
76°
53°
10
60°
41°
11
55°
38°
12
56°
40°
13
62°
44°
14
69°
42°
15
62°
45°
16
58°
40°
17
56°
40°
18
54°
38°
19
56°
42°
20
55°
37°
21
57°
45°
22
56°
44°
23
61°
44°
24
67°
43°
25
68°
45°
26
68°
44°
27
65°
42°
28
57°
37°
29
53°
32°
30
54°
41°
1
56°
40°
2
63°
41°
3
62°
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 53° to 76°, 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.
