S
M
T
W
T
F
S
30
92°
55°
31
95°
56°
1
95°
58°
2
92°
54°
3
90°
54°
4
90°
55°
5
91°
55°
6
91°
54°
7
90°
54°
8
90°
55°
9
89°
56°
10
89°
60°
11
90°
56°
12
89°
59°
13
91°
61°
14
94°
61°
15
95°
60°
16
96°
58°
17
94°
57°
18
94°
57°
19
93°
56°
20
91°
57°
21
93°
58°
22
94°
58°
23
93°
57°
24
87°
58°
25
83°
57°
26
82°
56°
27
83°
57°
28
84°
58°
29
85°
57°
30
83°
57°
1
84°
54°
2
83°
54°
3
89°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Monument Hills
Monument Hills's September 2026 forecast shows daily high temperatures ranging from 82° to 96°, with overnight lows between 54° and 61°. The average high for September is 90° 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 Monument Hills. See also: October | November | December.