S
M
T
W
T
F
S
31
74°
43°
1
75°
53°
2
76°
53°
3
82°
57°
4
89°
61°
5
94°
64°
6
90°
67°
7
86°
64°
8
85°
65°
9
84°
67°
10
81°
65°
11
86°
66°
12
86°
64°
13
84°
65°
14
83°
64°
15
80°
60°
16
76°
59°
17
76°
59°
18
78°
60°
19
78°
60°
20
81°
64°
21
80°
66°
22
78°
66°
23
78°
68°
24
80°
64°
25
80°
62°
26
81°
66°
27
87°
69°
28
84°
66°
29
81°
62°
30
80°
63°
1
80°
62°
2
81°
63°
3
84°
69°
4
87°
69°
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 75° to 94°, with overnight lows between 53° and 69°. The average high for June is 82° with an average low of 63°. 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.
