S
M
T
W
T
F
S
30
67°
42°
31
74°
37°
1
65°
37°
2
67°
38°
3
65°
44°
4
67°
43°
5
72°
43°
6
73°
42°
7
63°
36°
8
61°
35°
9
62°
35°
10
63°
39°
11
67°
42°
12
67°
42°
13
60°
43°
14
62°
44°
15
61°
41°
16
61°
41°
17
62°
39°
18
60°
41°
19
59°
37°
20
62°
33°
21
63°
32°
22
60°
33°
23
59°
33°
24
61°
37°
25
66°
39°
26
61°
38°
27
58°
39°
28
58°
38°
29
Hist. Avg.
58°
44°
30
Hist. Avg.
57°
43°
1
Hist. Avg.
57°
43°
2
Hist. Avg.
56°
43°
3
Hist. Avg.
56°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rimrock
Rimrock's September 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 32° and 44°. The average high for September is 64° with an average low of 39°. 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 Rimrock. See also: October | November | December.