S
M
T
W
T
F
S
28
50°
45°
29
50°
45°
30
57°
45°
1
57°
46°
2
56°
47°
3
54°
46°
4
54°
46°
5
51°
43°
6
56°
43°
7
61°
49°
8
60°
55°
9
61°
52°
10
57°
51°
11
61°
50°
12
60°
49°
13
60°
54°
14
60°
54°
15
N/A
16
66°
54°
17
63°
52°
18
64°
51°
19
68°
54°
20
65°
54°
21
70°
55°
22
69°
57°
23
68°
55°
24
68°
56°
25
66°
55°
26
68°
55°
27
66°
53°
28
65°
54°
29
67°
52°
30
67°
56°
31
64°
54°
1
64°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in St. John Island
St. John Island's July 2026 forecast shows daily high temperatures ranging from 63° to 70°, with overnight lows between 51° and 57°. The average high for July is 66° with an average low of 54°. 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.
