S
M
T
W
T
F
S
28
58°
48°
29
59°
47°
30
59°
48°
1
60°
47°
2
59°
48°
3
64°
49°
4
66°
49°
5
62°
50°
6
61°
51°
7
65°
52°
8
68°
51°
9
67°
53°
10
69°
54°
11
68°
51°
12
69°
46°
13
69°
53°
14
70°
55°
15
69°
54°
16
70°
54°
17
69°
52°
18
69°
49°
19
67°
49°
20
67°
47°
21
64°
47°
22
66°
54°
23
70°
50°
24
69°
49°
25
63°
49°
26
65°
50°
27
64°
49°
28
63°
47°
29
62°
47°
30
62°
46°
31
64°
47°
1
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St. John Island
St. John Island's July 2026 forecast shows daily high temperatures ranging from 58° to 70°, with overnight lows between 46° and 55°. The average high for July 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 July weather will actually feel in St. John Island. See also: August | September | October.
