S
M
T
W
T
F
S
31
89°
80°
1
91°
81°
2
90°
73°
3
83°
69°
4
88°
67°
5
90°
70°
6
92°
72°
7
91°
76°
8
93°
77°
9
92°
74°
10
88°
75°
11
88°
74°
12
87°
76°
13
89°
75°
14
87°
73°
15
86°
74°
16
87°
76°
17
89°
75°
18
90°
76°
19
90°
76°
20
89°
77°
21
90°
77°
22
89°
76°
23
89°
77°
24
90°
77°
25
88°
76°
26
90°
77°
27
90°
76°
28
89°
77°
29
88°
77°
30
86°
76°
1
87°
77°
2
87°
76°
3
88°
76°
4
88°
77°
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 83° to 93°, with overnight lows between 67° and 77°. The average high for June is 89° with an average low of 75°. 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.
