S
M
T
W
T
F
S
31
70°
37°
1
64°
39°
2
74°
49°
3
79°
55°
4
87°
59°
5
90°
65°
6
87°
60°
7
70°
54°
8
71°
54°
9
74°
56°
10
77°
59°
11
74°
59°
12
80°
59°
13
77°
60°
14
78°
56°
15
73°
54°
16
72°
54°
17
72°
55°
18
74°
57°
19
74°
58°
20
75°
57°
21
74°
56°
22
74°
56°
23
75°
57°
24
74°
63°
25
75°
60°
26
75°
58°
27
76°
63°
28
79°
64°
29
77°
60°
30
76°
59°
1
75°
59°
2
76°
62°
3
78°
65°
4
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Johnston
Johnston's June 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 39° and 66°. The average high for June is 76° with an average low of 58°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Johnston. See also: July | August | September.
