S
M
T
W
T
F
S
30
79°
51°
31
79°
52°
1
78°
53°
2
76°
53°
3
77°
54°
4
82°
49°
5
76°
50°
6
76°
52°
7
77°
52°
8
75°
51°
9
76°
47°
10
75°
51°
11
76°
44°
12
73°
46°
13
74°
46°
14
75°
48°
15
74°
46°
16
74°
46°
17
73°
43°
18
72°
44°
19
75°
45°
20
74°
45°
21
73°
41°
22
71°
43°
23
78°
50°
24
69°
40°
25
69°
41°
26
Hist. Avg.
72°
44°
27
Hist. Avg.
71°
43°
28
Hist. Avg.
71°
43°
29
Hist. Avg.
70°
42°
30
Hist. Avg.
70°
42°
1
Hist. Avg.
70°
42°
2
Hist. Avg.
69°
41°
3
Hist. Avg.
69°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Waterton
Waterton's September 2026 forecast shows daily high temperatures ranging from 69° to 82°, with overnight lows between 40° and 54°. The average high for September is 75° with an average low of 48°. 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. See also: October | November | December.
