S
M
T
W
T
F
S
31
59°
31°
1
59°
32°
2
62°
34°
3
64°
36°
4
63°
35°
5
54°
32°
6
56°
33°
7
59°
36°
8
58°
31°
9
63°
34°
10
60°
33°
11
57°
32°
12
57°
32°
13
58°
30°
14
59°
32°
15
60°
36°
16
66°
37°
17
69°
36°
18
69°
38°
19
70°
36°
20
69°
37°
21
68°
35°
22
69°
34°
23
71°
36°
24
73°
39°
25
74°
41°
26
75°
41°
27
74°
40°
28
65°
35°
29
69°
39°
30
71°
40°
1
74°
41°
2
75°
42°
3
75°
43°
4
76°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Keystone
Keystone's June 2026 forecast shows daily high temperatures ranging from 54° to 76°, with overnight lows between 30° and 43°. The average high for June is 66° with an average low of 36°. 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 Keystone. See also: July | August | September.
