S
M
T
W
T
F
S
29
83°
45°
30
83°
64°
31
86°
64°
1
86°
68°
2
81°
64°
3
83°
68°
4
73°
54°
5
69°
49°
6
74°
47°
7
76°
46°
8
79°
52°
9
82°
62°
10
79°
63°
11
79°
66°
12
74°
67°
13
84°
67°
14
81°
66°
15
80°
63°
16
83°
65°
17
82°
64°
18
80°
66°
19
82°
64°
20
83°
64°
21
86°
65°
22
78°
56°
23
80°
62°
24
81°
62°
25
82°
61°
26
81°
62°
27
80°
62°
28
80°
61°
29
81°
63°
30
78°
64°
1
80°
63°
2
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sunnyvale
Sunnyvale's April 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 56° and 67°. The average high for April is 80° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Sunnyvale. See also: May | June | July.
