S
M
T
W
T
F
S
26
90°
57°
27
90°
57°
28
91°
58°
29
91°
58°
30
90°
57°
31
90°
57°
1
95°
58°
2
96°
59°
3
92°
58°
4
90°
56°
5
89°
56°
6
90°
56°
7
90°
57°
8
91°
58°
9
90°
57°
10
96°
56°
11
91°
56°
12
94°
55°
13
95°
57°
14
97°
59°
15
96°
60°
16
96°
61°
17
97°
61°
18
97°
60°
19
96°
61°
20
97°
61°
21
97°
60°
22
96°
60°
23
97°
59°
24
96°
60°
25
96°
60°
26
95°
61°
27
96°
60°
28
96°
60°
29
95°
58°
30
94°
57°
31
93°
55°
1
92°
55°
2
91°
54°
3
90°
53°
4
89°
52°
5
89°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Vacaville
Vacaville's August 2026 forecast shows daily high temperatures ranging from 89° to 97°, with overnight lows between 52° and 61°. The average high for August is 93° 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 August weather will actually feel in Vacaville. See also: September | October | November.
