S
M
T
W
T
F
S
28
64°
52°
29
64°
52°
30
66°
57°
1
63°
55°
2
63°
55°
3
61°
54°
4
61°
57°
5
61°
57°
6
61°
57°
7
64°
57°
8
77°
57°
9
72°
55°
10
79°
54°
11
66°
58°
12
71°
49°
13
71°
49°
14
74°
52°
15
75°
54°
16
77°
56°
17
74°
57°
18
71°
54°
19
68°
51°
20
69°
52°
21
70°
53°
22
70°
54°
23
69°
55°
24
66°
54°
25
64°
51°
26
65°
52°
27
64°
52°
28
64°
52°
29
65°
54°
30
64°
52°
31
65°
54°
1
66°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Johnstone
Johnstone's July 2026 forecast shows daily high temperatures ranging from 64° to 77°, with overnight lows between 49° and 58°. The average high for July is 69° with an average low of 53°. 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 Johnstone. See also: August | September | October.
