S
M
T
W
T
F
S
30
78°
63°
31
80°
62°
1
81°
61°
2
74°
58°
3
73°
58°
4
74°
60°
5
77°
60°
6
80°
61°
7
81°
62°
8
81°
62°
9
80°
61°
10
80°
61°
11
79°
60°
12
80°
62°
13
80°
62°
14
75°
52°
15
68°
53°
16
70°
56°
17
72°
55°
18
67°
51°
19
68°
48°
20
68°
50°
21
74°
54°
22
75°
56°
23
75°
47°
24
67°
48°
25
68°
51°
26
73°
55°
27
72°
53°
28
74°
46°
29
65°
44°
30
63°
46°
1
63°
50°
2
70°
49°
3
71°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Peninsula
Peninsula's September 2026 forecast shows daily high temperatures ranging from 63° to 81°, with overnight lows between 44° and 63°. The average high for September is 74° with an average low of 55°. 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 Peninsula. See also: October | November | December.
