S
M
T
W
T
F
S
28
99°
78°
29
96°
80°
30
92°
80°
1
90°
77°
2
93°
75°
3
92°
76°
4
94°
76°
5
94°
79°
6
96°
80°
7
97°
80°
8
99°
80°
9
100°
74°
10
99°
75°
11
100°
80°
12
99°
71°
13
90°
74°
14
82°
75°
15
87°
77°
16
88°
79°
17
92°
79°
18
90°
79°
19
94°
76°
20
92°
77°
21
90°
75°
22
91°
76°
23
89°
75°
24
87°
76°
25
88°
77°
26
91°
75°
27
90°
76°
28
92°
78°
29
92°
77°
30
91°
78°
31
92°
79°
1
92°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. Helena Island
St. Helena Island's July 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 75° and 79°. The average high for July is 90° with an average low of 77°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in St. Helena Island. See also: August | September | October.
