S
M
T
W
T
F
S
30
64°
51°
31
64°
50°
1
71°
51°
2
75°
52°
3
73°
51°
4
74°
49°
5
74°
49°
6
75°
48°
7
74°
49°
8
75°
48°
9
71°
47°
10
72°
47°
11
70°
45°
12
68°
40°
13
59°
40°
14
63°
47°
15
68°
38°
16
63°
37°
17
59°
44°
18
63°
42°
19
67°
45°
20
69°
47°
21
71°
42°
22
69°
37°
23
59°
31°
24
57°
35°
25
61°
34°
26
62°
40°
27
65°
41°
28
67°
42°
29
68°
38°
30
63°
29°
1
53°
36°
2
57°
36°
3
55°
31°
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 75°, with overnight lows between 29° and 52°. The average high for September is 66° with an average low of 43°. 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.
