S
M
T
W
T
F
S
31
66°
45°
1
63°
48°
2
67°
46°
3
65°
51°
4
70°
55°
5
72°
47°
6
68°
49°
7
66°
49°
8
71°
51°
9
75°
54°
10
76°
55°
11
77°
56°
12
74°
58°
13
77°
55°
14
78°
52°
15
79°
57°
16
79°
57°
17
80°
59°
18
79°
52°
19
75°
50°
20
70°
50°
21
67°
54°
22
71°
57°
23
75°
58°
24
70°
52°
25
73°
53°
26
74°
50°
27
71°
51°
28
70°
57°
29
75°
53°
30
77°
54°
1
77°
62°
2
81°
63°
3
81°
62°
4
82°
55°
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 63° to 82°, with overnight lows between 45° and 63°. The average high for June is 73° with an average low of 54°. 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.
