S
M
T
W
T
F
S
30
92°
58°
31
96°
58°
1
96°
60°
2
95°
59°
3
92°
60°
4
89°
59°
5
94°
60°
6
96°
60°
7
96°
59°
8
95°
60°
9
95°
57°
10
91°
52°
11
88°
52°
12
89°
51°
13
88°
54°
14
87°
55°
15
89°
54°
16
92°
56°
17
90°
59°
18
93°
60°
19
85°
60°
20
85°
59°
21
92°
59°
22
92°
58°
23
90°
59°
24
89°
59°
25
91°
58°
26
90°
58°
27
90°
56°
28
84°
57°
29
84°
58°
30
86°
58°
1
89°
59°
2
91°
58°
3
90°
56°
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 84° to 96°, with overnight lows between 51° and 60°. The average high for September is 91° with an average low of 58°. 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.