S
M
T
W
T
F
S
26
87°
81°
27
88°
80°
28
87°
81°
29
87°
81°
30
88°
80°
31
87°
81°
1
87°
81°
2
88°
80°
3
90°
78°
4
90°
79°
5
89°
79°
6
89°
80°
7
90°
77°
8
89°
77°
9
89°
79°
10
90°
80°
11
89°
79°
12
89°
80°
13
90°
80°
14
90°
79°
15
89°
80°
16
90°
79°
17
89°
80°
18
90°
79°
19
90°
79°
20
89°
80°
21
89°
79°
22
90°
79°
23
89°
80°
24
89°
79°
25
90°
80°
26
89°
80°
27
90°
79°
28
90°
80°
29
89°
80°
30
89°
78°
31
90°
79°
1
89°
80°
2
88°
79°
3
90°
80°
4
90°
80°
5
91°
81°
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 87° to 91°, with overnight lows between 77° and 81°. The average high for August is 89° with an average low of 80°. 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.
