S
M
T
W
T
F
S
28
58°
44°
29
57°
45°
30
57°
46°
1
58°
47°
2
59°
48°
3
60°
46°
4
61°
44°
5
60°
48°
6
66°
50°
7
64°
47°
8
63°
48°
9
62°
51°
10
69°
52°
11
68°
51°
12
63°
52°
13
66°
53°
14
69°
53°
15
70°
52°
16
69°
51°
17
70°
52°
18
64°
54°
19
64°
54°
20
70°
51°
21
64°
48°
22
62°
48°
23
67°
52°
24
70°
54°
25
71°
54°
26
69°
50°
27
64°
48°
28
64°
53°
29
63°
54°
30
66°
55°
31
71°
54°
1
66°
50°
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 57° to 71°, with overnight lows between 44° 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.
