S
M
T
W
T
F
S
30
91°
56°
31
93°
57°
1
94°
57°
2
91°
56°
3
89°
56°
4
89°
55°
5
88°
56°
6
90°
55°
7
89°
53°
8
89°
55°
9
88°
56°
10
88°
57°
11
89°
55°
12
89°
59°
13
91°
61°
14
93°
60°
15
93°
59°
16
94°
59°
17
93°
58°
18
93°
57°
19
92°
57°
20
91°
58°
21
93°
58°
22
93°
57°
23
92°
58°
24
88°
57°
25
82°
54°
26
80°
53°
27
81°
54°
28
82°
53°
29
83°
55°
30
82°
55°
1
81°
54°
2
81°
52°
3
88°
56°
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 80° to 94°, with overnight lows between 52° and 61°. The average high for September is 89° with an average low of 56°. 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.