S
M
T
W
T
F
S
30
89°
71°
31
89°
70°
1
85°
70°
2
85°
72°
3
86°
70°
4
85°
70°
5
88°
72°
6
89°
70°
7
87°
69°
8
84°
70°
9
84°
68°
10
83°
69°
11
84°
69°
12
85°
72°
13
86°
71°
14
83°
72°
15
Hist. Avg.
84°
70°
16
Hist. Avg.
84°
69°
17
Hist. Avg.
84°
69°
18
Hist. Avg.
84°
69°
19
Hist. Avg.
83°
69°
20
Hist. Avg.
83°
68°
21
Hist. Avg.
83°
68°
22
Hist. Avg.
83°
68°
23
Hist. Avg.
82°
67°
24
Hist. Avg.
82°
67°
25
Hist. Avg.
82°
67°
26
Hist. Avg.
82°
66°
27
Hist. Avg.
81°
66°
28
Hist. Avg.
81°
66°
29
Hist. Avg.
81°
65°
30
Hist. Avg.
80°
65°
1
Hist. Avg.
80°
65°
2
Hist. Avg.
80°
64°
3
Hist. Avg.
80°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hilton Head Island
Hilton Head Island's September 2026 forecast shows daily high temperatures ranging from 83° to 89°, with overnight lows between 68° and 72°. The average high for September is 86° with an average low of 70°. 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 Hilton Head Island. See also: October | November | December.
