S
M
T
W
T
F
S
31
68°
35°
1
65°
33°
2
64°
34°
3
69°
35°
4
64°
36°
5
62°
36°
6
61°
31°
7
63°
35°
8
63°
30°
9
65°
34°
10
64°
34°
11
65°
33°
12
65°
30°
13
66°
32°
14
68°
34°
15
71°
38°
16
72°
38°
17
73°
37°
18
74°
37°
19
72°
30°
20
73°
34°
21
75°
35°
22
78°
34°
23
79°
33°
24
80°
35°
25
80°
38°
26
81°
42°
27
80°
42°
28
75°
37°
29
77°
41°
30
80°
40°
1
81°
42°
2
81°
43°
3
82°
43°
4
81°
44°
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 61° to 82°, with overnight lows between 30° and 44°. The average high for June is 72° 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.
