S
M
T
W
T
F
S
26
86°
67°
27
81°
62°
28
81°
63°
29
83°
67°
30
82°
61°
31
83°
67°
1
85°
63°
2
83°
59°
3
82°
61°
4
79°
59°
5
80°
60°
6
80°
60°
7
81°
61°
8
82°
60°
9
85°
65°
10
81°
66°
11
83°
66°
12
86°
67°
13
86°
67°
14
85°
64°
15
86°
59°
16
84°
59°
17
80°
62°
18
79°
62°
19
79°
58°
20
78°
57°
21
78°
58°
22
79°
59°
23
84°
63°
24
85°
64°
25
84°
58°
26
85°
56°
27
78°
56°
28
78°
57°
29
77°
63°
30
81°
63°
31
83°
62°
1
84°
58°
2
81°
56°
3
82°
62°
4
79°
62°
5
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. John
St. John's August 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 56° and 67°. The average high for August is 82° with an average low of 61°. 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. See also: September | October | November.
