S
M
T
W
T
F
S
31
72°
42°
1
79°
42°
2
84°
43°
3
81°
55°
4
79°
48°
5
81°
52°
6
69°
46°
7
69°
39°
8
63°
44°
9
73°
43°
10
78°
46°
11
85°
50°
12
90°
50°
13
88°
49°
14
89°
51°
15
94°
52°
16
91°
51°
17
90°
46°
18
86°
49°
19
86°
51°
20
87°
49°
21
82°
50°
22
73°
46°
23
75°
48°
24
74°
48°
25
77°
51°
26
82°
52°
27
82°
52°
28
83°
51°
29
82°
50°
30
75°
48°
1
78°
52°
2
83°
53°
3
81°
53°
4
79°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Mount Shasta
Mount Shasta's June 2026 forecast shows daily high temperatures ranging from 63° to 94°, with overnight lows between 43° and 53°. The average high for June is 82° with an average low of 49°. 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 Mount Shasta. See also: July | August | September.