S
M
T
W
T
F
S
29
88°
48°
30
78°
48°
31
69°
57°
1
62°
55°
2
67°
41°
3
77°
49°
4
81°
43°
5
84°
45°
6
84°
46°
7
79°
41°
8
84°
47°
9
77°
54°
10
67°
55°
11
62°
47°
12
61°
48°
13
67°
43°
14
69°
45°
15
72°
46°
16
71°
48°
17
75°
46°
18
77°
39°
19
77°
46°
20
64°
54°
21
66°
51°
22
66°
45°
23
74°
41°
24
73°
47°
25
61°
49°
26
66°
47°
27
71°
44°
28
77°
46°
29
82°
51°
30
84°
52°
1
82°
53°
2
79°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Vacaville
Vacaville's April 2026 forecast shows daily high temperatures ranging from 61° to 84°, with overnight lows between 44° and 53°. The average high for April is 75° with an average low of 49°. 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 Vacaville. See also: May | June | July.