S
M
T
W
T
F
S
30
63°
55°
31
60°
54°
1
61°
52°
2
60°
54°
3
60°
54°
4
61°
53°
5
60°
55°
6
62°
55°
7
61°
54°
8
62°
55°
9
63°
55°
10
63°
54°
11
61°
53°
12
59°
53°
13
60°
54°
14
60°
53°
15
60°
53°
16
59°
52°
17
60°
49°
18
59°
49°
19
57°
50°
20
56°
48°
21
56°
51°
22
57°
53°
23
60°
52°
24
61°
51°
25
57°
47°
26
58°
47°
27
59°
49°
28
57°
48°
29
59°
49°
30
59°
47°
1
55°
45°
2
54°
45°
3
54°
50°
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 63°, with overnight lows between 45° and 55°. The average high for September is 59° with an average low of 51°. 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.
