S
M
T
W
T
F
S
28
98°
78°
29
99°
79°
30
96°
76°
1
98°
75°
2
98°
74°
3
99°
73°
4
102°
75°
5
99°
76°
6
100°
72°
7
101°
74°
8
101°
72°
9
100°
76°
10
99°
77°
11
98°
74°
12
98°
72°
13
91°
74°
14
91°
72°
15
94°
71°
16
90°
72°
17
93°
73°
18
97°
73°
19
99°
75°
20
102°
74°
21
105°
73°
22
103°
78°
23
99°
74°
24
95°
80°
25
100°
77°
26
100°
73°
27
101°
74°
28
101°
75°
29
100°
75°
30
101°
75°
31
103°
78°
1
86°
82°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Sunnyvale
Sunnyvale's July 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for July 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 July weather will actually feel in Sunnyvale. See also: August | September | October.