S
M
T
W
T
F
S
26
70°
49°
27
68°
48°
28
63°
48°
29
62°
50°
30
67°
53°
31
69°
52°
1
71°
48°
2
69°
54°
3
70°
55°
4
71°
55°
5
70°
48°
6
65°
49°
7
64°
51°
8
68°
46°
9
63°
50°
10
66°
49°
11
67°
55°
12
63°
54°
13
65°
49°
14
68°
48°
15
66°
50°
16
68°
51°
17
61°
47°
18
62°
48°
19
Hist. Avg.
63°
49°
20
Hist. Avg.
63°
49°
21
Hist. Avg.
63°
49°
22
Hist. Avg.
63°
49°
23
Hist. Avg.
62°
48°
24
Hist. Avg.
62°
48°
25
Hist. Avg.
62°
48°
26
Hist. Avg.
62°
48°
27
Hist. Avg.
62°
47°
28
Hist. Avg.
61°
47°
29
Hist. Avg.
61°
47°
30
Hist. Avg.
61°
47°
31
Hist. Avg.
60°
46°
1
Hist. Avg.
60°
46°
2
Hist. Avg.
60°
46°
3
Hist. Avg.
60°
45°
4
Hist. Avg.
59°
45°
5
Hist. Avg.
59°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in St. John Island
St. John Island's August 2026 forecast shows daily high temperatures ranging from 61° to 71°, with overnight lows between 46° and 55°. The average high for August is 67° 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 August weather will actually feel in St. John Island. See also: September | October | November.
