S
M
T
W
T
F
S
26
66°
51°
27
68°
48°
28
76°
42°
29
81°
44°
30
84°
46°
1
82°
52°
2
71°
55°
3
70°
54°
4
64°
51°
5
67°
53°
6
78°
57°
7
82°
53°
8
84°
53°
9
90°
54°
10
87°
54°
11
93°
50°
12
88°
56°
13
82°
59°
14
90°
50°
15
89°
50°
16
85°
54°
17
77°
47°
18
85°
62°
19
90°
51°
20
92°
51°
21
96°
52°
22
90°
56°
23
82°
55°
24
85°
52°
25
74°
54°
26
72°
50°
27
74°
47°
28
72°
54°
29
74°
57°
30
82°
53°
31
89°
51°
1
95°
52°
2
92°
57°
3
96°
57°
4
93°
59°
5
97°
58°
6
84°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Vacaville
Vacaville's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May 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 May weather will actually feel in Vacaville. See also: June | July | August.
