S
M
T
W
T
F
S
30
78°
66°
31
78°
71°
1
80°
68°
2
73°
66°
3
86°
69°
4
86°
76°
5
81°
69°
6
74°
63°
7
80°
60°
8
82°
65°
9
80°
66°
10
88°
72°
11
81°
65°
12
78°
70°
13
79°
68°
14
81°
61°
15
76°
63°
16
84°
65°
17
82°
64°
18
81°
59°
19
75°
57°
20
73°
57°
21
71°
58°
22
73°
56°
23
73°
59°
24
77°
57°
25
69°
53°
26
69°
54°
27
73°
61°
28
77°
57°
29
70°
53°
30
72°
59°
1
73°
57°
2
68°
54°
3
72°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Garden City South
Garden City South's September 2026 forecast shows daily high temperatures ranging from 68° to 84°, with overnight lows between 53° and 70°. The average high for September is 75° with an average low of 59°. 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 Garden City South. See also: October | November | December.