S
M
T
W
T
F
S
28
93°
73°
29
95°
77°
30
92°
75°
1
90°
75°
2
90°
72°
3
92°
75°
4
91°
76°
5
92°
75°
6
92°
74°
7
96°
76°
8
95°
74°
9
93°
76°
10
92°
77°
11
91°
76°
12
93°
77°
13
92°
77°
14
92°
78°
15
90°
77°
16
90°
75°
17
91°
74°
18
87°
76°
19
87°
75°
20
92°
77°
21
90°
76°
22
87°
75°
23
85°
74°
24
86°
75°
25
88°
76°
26
89°
76°
27
88°
75°
28
88°
77°
29
89°
77°
30
88°
76°
31
88°
77°
1
89°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Port St. John
Port St. John's July 2026 forecast shows daily high temperatures ranging from 85° to 96°, with overnight lows between 74° and 78°. The average high for July is 90° with an average low of 76°. 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 Port St. John. See also: August | September | October.
