S
M
T
W
T
F
S
30
79°
62°
31
88°
70°
1
88°
72°
2
91°
72°
3
89°
68°
4
78°
66°
5
79°
61°
6
77°
54°
7
78°
55°
8
82°
57°
9
88°
69°
10
81°
66°
11
79°
60°
12
74°
60°
13
84°
65°
14
70°
52°
15
82°
55°
16
84°
69°
17
80°
69°
18
77°
60°
19
69°
61°
20
70°
61°
21
64°
53°
22
61°
55°
23
60°
51°
24
67°
42°
25
65°
46°
26
66°
48°
27
67°
52°
28
65°
50°
29
68°
49°
30
65°
50°
1
67°
49°
2
66°
48°
3
64°
55°
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 60° to 68°, with overnight lows between 42° and 55°. The average high for September is 65° with an average low of 50°. 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.
