S
M
T
W
T
F
S
26
99°
64°
27
99°
65°
28
102°
64°
29
100°
67°
30
101°
66°
31
104°
68°
1
106°
67°
2
102°
71°
3
104°
70°
4
107°
72°
5
105°
70°
6
105°
73°
7
108°
75°
8
109°
76°
9
104°
72°
10
99°
71°
11
95°
69°
12
94°
71°
13
96°
72°
14
97°
70°
15
96°
68°
16
93°
71°
17
94°
71°
18
95°
72°
19
92°
71°
20
92°
68°
21
93°
68°
22
93°
69°
23
94°
69°
24
94°
70°
25
97°
71°
26
98°
72°
27
98°
72°
28
97°
71°
29
96°
71°
30
92°
70°
31
90°
67°
1
88°
65°
2
89°
68°
3
93°
69°
4
92°
69°
5
89°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Shasta Lake
Shasta Lake's August 2026 forecast shows daily high temperatures ranging from 88° to 109°, with overnight lows between 65° and 76°. The average high for August is 97° with an average low of 70°. 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 Shasta Lake. See also: September | October | November.
