S
M
T
W
T
F
S
30
86°
76°
31
87°
76°
1
87°
75°
2
88°
76°
3
87°
76°
4
88°
75°
5
87°
75°
6
87°
76°
7
88°
74°
8
88°
75°
9
89°
75°
10
86°
74°
11
86°
74°
12
87°
75°
13
86°
74°
14
88°
75°
15
87°
74°
16
88°
75°
17
88°
75°
18
87°
73°
19
89°
73°
20
85°
75°
21
88°
74°
22
88°
75°
23
89°
75°
24
88°
74°
25
88°
75°
26
87°
75°
27
88°
74°
28
88°
74°
29
87°
75°
30
86°
73°
1
87°
74°
2
86°
70°
3
85°
69°
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 85° to 89°, with overnight lows between 69° and 76°. 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.
