S
M
T
W
T
F
S
28
90°
80°
29
89°
78°
30
90°
79°
1
89°
79°
2
88°
78°
3
89°
79°
4
90°
80°
5
88°
80°
6
87°
81°
7
87°
81°
8
88°
80°
9
87°
81°
10
87°
81°
11
88°
80°
12
87°
81°
13
87°
81°
14
88°
80°
15
87°
81°
16
87°
81°
17
88°
80°
18
88°
80°
19
87°
81°
20
87°
81°
21
88°
80°
22
87°
81°
23
87°
81°
24
88°
80°
25
87°
81°
26
87°
81°
27
88°
80°
28
87°
81°
29
87°
81°
30
88°
80°
31
87°
81°
1
87°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in St John
St John's July 2026 forecast shows daily high temperatures ranging from 87° to 90°, with overnight lows between 78° and 81°. The average high for July is 88° 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 July weather will actually feel in St John. See also: August | September | October.
