S
M
T
W
T
F
S
30
84°
50°
31
82°
51°
1
83°
48°
2
83°
49°
3
81°
52°
4
84°
50°
5
82°
49°
6
83°
50°
7
82°
47°
8
78°
49°
9
78°
45°
10
77°
45°
11
80°
44°
12
81°
47°
13
81°
44°
14
80°
49°
15
81°
48°
16
78°
46°
17
79°
40°
18
74°
39°
19
73°
39°
20
73°
40°
21
75°
44°
22
79°
48°
23
79°
48°
24
75°
45°
25
74°
46°
26
73°
44°
27
71°
40°
28
72°
39°
29
68°
40°
30
70°
42°
1
Hist. Avg.
64°
30°
2
Hist. Avg.
63°
30°
3
Hist. Avg.
63°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cimarron
Cimarron's September 2026 forecast shows daily high temperatures ranging from 68° to 84°, with overnight lows between 39° and 52°. The average high for September is 78° with an average low of 46°. 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 Cimarron. See also: October | November | December.