S
M
T
W
T
F
S
30
68°
54°
31
68°
53°
1
69°
54°
2
72°
55°
3
73°
55°
4
75°
54°
5
75°
55°
6
73°
54°
7
74°
45°
8
66°
49°
9
66°
46°
10
74°
44°
11
65°
46°
12
71°
49°
13
68°
41°
14
70°
38°
15
61°
44°
16
63°
49°
17
69°
49°
18
71°
50°
19
66°
49°
20
71°
52°
21
71°
47°
22
72°
48°
23
74°
47°
24
72°
45°
25
73°
40°
26
69°
36°
27
58°
34°
28
55°
36°
29
56°
40°
30
59°
38°
1
58°
45°
2
63°
44°
3
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alberta
Alberta's September 2026 forecast shows daily high temperatures ranging from 55° to 75°, with overnight lows between 34° and 55°. The average high for September is 68° with an average low of 47°. 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 Alberta. See also: October | November | December.
