S
M
T
W
T
F
S
30
64°
45°
31
70°
43°
1
79°
37°
2
72°
47°
3
62°
51°
4
57°
41°
5
53°
45°
6
55°
47°
7
62°
44°
8
70°
38°
9
76°
37°
10
61°
39°
11
53°
35°
12
56°
33°
13
64°
29°
14
56°
38°
15
55°
30°
16
69°
32°
17
69°
33°
18
69°
39°
19
70°
38°
20
69°
39°
21
70°
40°
22
69°
37°
23
62°
38°
24
62°
38°
25
60°
35°
26
63°
36°
27
61°
35°
28
53°
29°
29
54°
36°
30
54°
34°
1
53°
35°
2
54°
32°
3
52°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Rocky Mountain House
Rocky Mountain House's September 2026 forecast shows daily high temperatures ranging from 52° to 70°, with overnight lows between 29° and 40°. The average high for September is 61° with an average low of 35°. 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 Rocky Mountain House. See also: October | November | December.
