S
M
T
W
T
F
S
30
92°
58°
31
94°
59°
1
95°
61°
2
93°
59°
3
89°
58°
4
87°
61°
5
91°
61°
6
94°
60°
7
95°
60°
8
93°
59°
9
93°
54°
10
89°
53°
11
86°
52°
12
87°
50°
13
86°
52°
14
85°
54°
15
86°
55°
16
90°
57°
17
88°
59°
18
89°
59°
19
82°
58°
20
82°
58°
21
86°
57°
22
90°
58°
23
87°
57°
24
87°
57°
25
90°
56°
26
89°
54°
27
89°
52°
28
85°
54°
29
82°
56°
30
87°
57°
1
89°
58°
2
90°
56°
3
89°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Montezuma
Montezuma's September 2026 forecast shows daily high temperatures ranging from 82° to 95°, with overnight lows between 50° and 61°. The average high for September is 89° with an average low of 57°. 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 Montezuma. See also: October | November | December.