S
M
T
W
T
F
S
30
89°
70°
31
88°
68°
1
88°
68°
2
89°
69°
3
88°
71°
4
90°
72°
5
91°
71°
6
90°
69°
7
89°
70°
8
88°
70°
9
86°
69°
10
86°
69°
11
87°
68°
12
88°
69°
13
88°
69°
14
87°
68°
15
88°
69°
16
88°
68°
17
87°
68°
18
87°
67°
19
86°
68°
20
87°
67°
21
87°
66°
22
86°
67°
23
87°
67°
24
87°
65°
25
86°
63°
26
86°
64°
27
85°
63°
28
85°
64°
29
84°
63°
30
85°
62°
1
83°
63°
2
85°
63°
3
Hist. Avg.
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pine Island
Pine Island's September 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 62° and 72°. The average high for September is 87° with an average low of 67°. 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 Pine Island. See also: October | November | December.