S
M
T
W
T
F
S
31
82°
49°
1
82°
54°
2
79°
57°
3
86°
50°
4
92°
54°
5
93°
55°
6
98°
56°
7
93°
57°
8
87°
54°
9
95°
57°
10
96°
59°
11
95°
55°
12
89°
53°
13
85°
53°
14
85°
57°
15
83°
53°
16
79°
52°
17
85°
51°
18
87°
55°
19
88°
56°
20
90°
56°
21
80°
54°
22
89°
57°
23
90°
56°
24
89°
57°
25
87°
57°
26
85°
56°
27
83°
57°
28
87°
55°
29
87°
56°
30
88°
53°
1
87°
56°
2
91°
58°
3
92°
59°
4
91°
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 79° to 98°, with overnight lows between 51° and 59°. The average high for June is 89° 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.
