S
M
T
W
T
F
S
26
98°
61°
27
96°
58°
28
97°
58°
29
97°
60°
30
99°
59°
31
98°
57°
1
103°
62°
2
106°
61°
3
106°
62°
4
101°
58°
5
101°
59°
6
101°
60°
7
102°
62°
8
101°
61°
9
100°
60°
10
95°
60°
11
94°
60°
12
94°
58°
13
95°
60°
14
98°
68°
15
89°
58°
16
89°
59°
17
90°
58°
18
91°
59°
19
89°
57°
20
89°
57°
21
94°
59°
22
93°
58°
23
91°
60°
24
94°
60°
25
95°
58°
26
95°
61°
27
94°
61°
28
95°
60°
29
93°
61°
30
92°
60°
31
93°
60°
1
92°
57°
2
92°
58°
3
94°
58°
4
89°
59°
5
89°
59°
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 106°, with overnight lows between 57° and 68°. The average high for August is 95° with an average low of 60°. 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.
