S
M
T
W
T
F
S
31
72°
63°
1
84°
67°
2
77°
56°
3
81°
54°
4
85°
59°
5
87°
62°
6
85°
65°
7
88°
66°
8
87°
68°
9
82°
67°
10
88°
69°
11
87°
69°
12
87°
66°
13
84°
68°
14
86°
67°
15
88°
71°
16
90°
70°
17
89°
71°
18
88°
70°
19
85°
70°
20
86°
69°
21
86°
71°
22
90°
71°
23
91°
70°
24
87°
71°
25
88°
70°
26
91°
71°
27
90°
71°
28
91°
72°
29
87°
71°
30
88°
69°
1
87°
67°
2
87°
71°
3
88°
72°
4
89°
72°
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 77° to 91°, with overnight lows between 54° and 72°. The average high for June is 87° with an average low of 68°. 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.
