S
M
T
W
T
F
S
30
89°
76°
31
90°
77°
1
90°
77°
2
90°
76°
3
89°
77°
4
90°
77°
5
89°
76°
6
88°
76°
7
88°
75°
8
87°
75°
9
89°
76°
10
88°
75°
11
86°
75°
12
88°
76°
13
89°
76°
14
89°
74°
15
88°
72°
16
85°
73°
17
86°
75°
18
88°
74°
19
88°
73°
20
87°
74°
21
87°
75°
22
88°
75°
23
86°
74°
24
85°
74°
25
84°
72°
26
85°
73°
27
84°
74°
28
85°
72°
29
86°
72°
30
85°
73°
1
85°
71°
2
86°
70°
3
86°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Peninsula
South Peninsula's September 2026 forecast shows daily high temperatures ranging from 84° to 90°, with overnight lows between 70° and 77°. The average high for September is 87° with an average low of 74°. 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 South Peninsula. See also: October | November | December.
