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°
49°
7
56°
52°
8
71°
45°
9
76°
52°
10
54°
42°
11
53°
37°
12
52°
38°
13
50°
41°
14
56°
40°
15
60°
43°
16
65°
45°
17
72°
50°
18
75°
49°
19
73°
48°
20
62°
44°
21
62°
46°
22
65°
45°
23
73°
48°
24
67°
43°
25
56°
41°
26
56°
43°
27
60°
40°
28
54°
38°
29
56°
37°
30
54°
36°
1
57°
40°
2
53°
32°
3
52°
29°
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 50° to 75°, with overnight lows between 29° and 50°. The average high for September is 60° with an average low of 41°. 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.
