S
M
T
W
T
F
S
26
72°
48°
27
71°
48°
28
72°
47°
29
72°
48°
30
71°
48°
31
72°
49°
1
72°
47°
2
71°
48°
3
71°
48°
4
70°
47°
5
71°
48°
6
71°
47°
7
70°
47°
8
71°
46°
9
71°
47°
10
70°
46°
11
68°
44°
12
64°
40°
13
63°
40°
14
63°
41°
15
64°
42°
16
66°
43°
17
66°
39°
18
66°
38°
19
67°
39°
20
65°
38°
21
65°
39°
22
66°
40°
23
65°
39°
24
64°
38°
25
64°
38°
26
65°
37°
27
64°
37°
28
64°
38°
29
63°
38°
30
64°
39°
31
65°
37°
1
66°
37°
2
63°
36°
3
62°
36°
4
61°
37°
5
61°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sierra
Sierra's August 2026 forecast shows daily high temperatures ranging from 61° to 72°, with overnight lows between 36° and 49°. The average high for August is 67° with an average low of 42°. 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 Sierra. See also: September | October | November.
