S
M
T
W
T
F
S
30
98°
82°
31
100°
75°
1
98°
72°
2
97°
71°
3
97°
71°
4
96°
74°
5
99°
74°
6
91°
78°
7
96°
78°
8
97°
75°
9
94°
73°
10
95°
74°
11
102°
79°
12
100°
76°
13
99°
77°
14
93°
67°
15
99°
75°
16
99°
75°
17
98°
73°
18
97°
67°
19
94°
65°
20
94°
65°
21
93°
66°
22
95°
69°
23
95°
68°
24
94°
66°
25
84°
61°
26
83°
61°
27
82°
59°
28
82°
60°
29
83°
61°
30
86°
62°
1
85°
62°
2
86°
61°
3
87°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Summerlin South
Summerlin South's September 2026 forecast shows daily high temperatures ranging from 82° to 102°, with overnight lows between 59° and 79°. The average high for September is 93° with an average low of 69°. 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 Summerlin South. See also: October | November | December.
