S
M
T
W
T
F
S
31
70°
44°
1
70°
50°
2
76°
48°
3
80°
52°
4
80°
56°
5
84°
60°
6
83°
64°
7
78°
56°
8
74°
53°
9
77°
56°
10
78°
57°
11
82°
60°
12
82°
59°
13
80°
60°
14
82°
59°
15
77°
54°
16
71°
50°
17
72°
50°
18
73°
50°
19
74°
51°
20
75°
55°
21
76°
58°
22
74°
59°
23
75°
59°
24
75°
56°
25
76°
52°
26
75°
59°
27
81°
60°
28
77°
56°
29
75°
54°
30
76°
53°
1
75°
53°
2
76°
54°
3
78°
61°
4
80°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Johnstown
Johnstown's June 2026 forecast shows daily high temperatures ranging from 71° to 84°, with overnight lows between 48° and 64°. The average high for June is 77° with an average low of 56°. 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 Johnstown. See also: July | August | September.
