S
M
T
W
T
F
S
30
89°
76°
31
N/A
1
86°
82°
2
86°
81°
3
86°
81°
4
86°
81°
5
85°
80°
6
83°
78°
7
83°
80°
8
84°
79°
9
85°
80°
10
82°
79°
11
82°
80°
12
81°
80°
13
82°
79°
14
81°
80°
15
81°
80°
16
82°
80°
17
81°
80°
18
81°
80°
19
82°
80°
20
81°
80°
21
81°
80°
22
82°
80°
23
81°
80°
24
81°
81°
25
82°
81°
26
82°
80°
27
81°
81°
28
81°
80°
29
82°
80°
30
82°
80°
1
82°
80°
2
82°
80°
3
81°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Helen Island
Helen Island's September 2026 forecast shows daily high temperatures ranging from 81° to 86°, with overnight lows between 78° and 82°. The average high for September is 82° with an average low of 80°. 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 Helen Island. See also: October | November | December.
