S
M
T
W
T
F
S
31
63°
43°
1
70°
48°
2
74°
49°
3
74°
50°
4
75°
51°
5
76°
51°
6
75°
52°
7
76°
51°
8
76°
52°
9
75°
51°
10
76°
53°
11
79°
53°
12
76°
52°
13
68°
51°
14
68°
48°
15
81°
52°
16
79°
42°
17
76°
42°
18
69°
47°
19
71°
50°
20
70°
52°
21
78°
45°
22
72°
48°
23
70°
51°
24
74°
48°
25
72°
47°
26
72°
46°
27
73°
46°
28
76°
49°
29
83°
54°
30
83°
55°
1
82°
54°
2
84°
56°
3
84°
55°
4
85°
57°
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 63° to 85°, with overnight lows between 42° and 57°. The average high for June is 75° with an average low of 50°. 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.
