S
M
T
W
T
F
S
26
88°
47°
27
88°
49°
28
89°
51°
29
90°
51°
30
91°
52°
31
94°
52°
1
91°
56°
2
86°
54°
3
90°
52°
4
96°
50°
5
96°
53°
6
96°
51°
7
98°
51°
8
98°
57°
9
93°
56°
10
95°
54°
11
93°
52°
12
89°
54°
13
83°
49°
14
81°
50°
15
79°
45°
16
87°
43°
17
88°
50°
18
91°
51°
19
93°
54°
20
91°
55°
21
88°
51°
22
85°
48°
23
87°
47°
24
87°
48°
25
88°
48°
26
86°
49°
27
85°
48°
28
83°
48°
29
82°
47°
30
77°
46°
31
75°
46°
1
75°
45°
2
81°
42°
3
76°
51°
4
76°
48°
5
80°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mount Shasta
Mount Shasta's August 2026 forecast shows daily high temperatures ranging from 75° to 91°, with overnight lows between 42° and 55°. The average high for August is 82° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Mount Shasta. See also: September | October | November.
