S
M
T
W
T
F
S
26
100°
73°
27
101°
74°
28
101°
75°
29
100°
75°
30
101°
75°
31
103°
78°
1
86°
82°
2
98°
76°
3
100°
75°
4
101°
76°
5
102°
81°
6
100°
81°
7
101°
79°
8
102°
80°
9
101°
76°
10
100°
79°
11
101°
78°
12
105°
81°
13
103°
82°
14
100°
82°
15
102°
81°
16
105°
82°
17
107°
79°
18
108°
82°
19
104°
82°
20
105°
83°
21
105°
85°
22
107°
82°
23
109°
85°
24
109°
85°
25
104°
83°
26
104°
84°
27
102°
81°
28
106°
80°
29
104°
79°
30
101°
81°
31
102°
80°
1
104°
81°
2
102°
80°
3
94°
78°
4
99°
77°
5
101°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sunnyvale
Sunnyvale's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Sunnyvale. See also: September | October | November.
