S
M
T
W
T
F
S
31
75°
44°
1
77°
49°
2
75°
47°
3
82°
48°
4
86°
49°
5
88°
54°
6
86°
61°
7
84°
62°
8
75°
57°
9
82°
59°
10
84°
66°
11
92°
68°
12
92°
69°
13
86°
62°
14
88°
58°
15
76°
61°
16
76°
49°
17
83°
53°
18
83°
71°
19
N/A
20
83°
61°
21
83°
62°
22
74°
63°
23
84°
58°
24
82°
60°
25
80°
62°
26
82°
60°
27
81°
59°
28
83°
63°
29
82°
67°
30
84°
66°
1
86°
65°
2
83°
65°
3
84°
63°
4
82°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
June Weather in Johnstown
Johnstown's June 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 58° and 67°. The average high for June is 82° with an average low of 62°. 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.
