S
M
T
W
T
F
S
30
75°
41°
31
75°
41°
1
74°
40°
2
65°
39°
3
69°
36°
4
71°
39°
5
76°
39°
6
66°
35°
7
63°
34°
8
68°
37°
9
70°
38°
10
73°
39°
11
72°
37°
12
67°
34°
13
59°
26°
14
70°
33°
15
71°
38°
16
72°
35°
17
70°
36°
18
71°
38°
19
72°
37°
20
71°
34°
21
70°
33°
22
70°
36°
23
71°
38°
24
72°
35°
25
69°
33°
26
67°
36°
27
68°
36°
28
70°
35°
29
59°
33°
30
60°
34°
1
62°
32°
2
56°
28°
3
54°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Waterton Park
Waterton Park's September 2026 forecast shows daily high temperatures ranging from 54° to 76°, with overnight lows between 26° and 41°. The average high for September is 68° with an average low of 36°. 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 Waterton Park. See also: October | November | December.
