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°
55°
10
85°
58°
11
83°
63°
12
71°
64°
13
84°
65°
14
81°
70°
15
79°
70°
16
86°
68°
17
84°
52°
18
63°
47°
19
72°
51°
20
71°
55°
21
72°
63°
22
78°
65°
23
84°
67°
24
79°
59°
25
78°
56°
26
71°
53°
27
72°
55°
28
76°
60°
29
79°
58°
30
82°
62°
1
85°
62°
2
83°
60°
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 63° to 86°, with overnight lows between 47° and 68°. The average high for April is 77° with an average low of 58°. 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.
