S
M
T
W
T
F
S
29
84°
54°
30
79°
57°
31
64°
59°
1
68°
57°
2
64°
54°
3
73°
48°
4
81°
50°
5
81°
52°
6
64°
52°
7
64°
50°
8
73°
54°
9
72°
57°
10
68°
57°
11
64°
52°
12
61°
50°
13
64°
50°
14
64°
48°
15
68°
50°
16
72°
51°
17
74°
48°
18
76°
48°
19
72°
53°
20
65°
51°
21
66°
50°
22
67°
51°
23
69°
52°
24
72°
53°
25
73°
52°
26
70°
53°
27
69°
52°
28
70°
50°
29
65°
50°
30
66°
47°
1
66°
48°
2
67°
49°
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 65° to 76°, with overnight lows between 47° and 53°. The average high for April is 69° with an average low of 50°. 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.
