S
M
T
W
T
F
S
31
74°
43°
1
75°
47°
2
74°
50°
3
80°
47°
4
84°
53°
5
87°
57°
6
87°
65°
7
85°
64°
8
76°
62°
9
80°
64°
10
87°
68°
11
92°
70°
12
91°
68°
13
86°
65°
14
87°
64°
15
74°
58°
16
74°
49°
17
84°
54°
18
81°
66°
19
79°
63°
20
82°
59°
21
80°
55°
22
83°
63°
23
78°
65°
24
82°
54°
25
83°
66°
26
83°
66°
27
73°
66°
28
85°
66°
29
89°
70°
30
91°
71°
1
97°
74°
2
96°
74°
3
95°
70°
4
92°
71°
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 73° to 97°, with overnight lows between 66° and 74°. The average high for June is 88° with an average low of 69°. 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.
