S
M
T
W
T
F
S
26
97°
56°
27
95°
56°
28
96°
57°
29
96°
61°
30
97°
61°
31
97°
62°
1
98°
61°
2
97°
59°
3
97°
61°
4
96°
60°
5
96°
61°
6
97°
61°
7
96°
60°
8
96°
60°
9
95°
59°
10
97°
60°
11
96°
59°
12
96°
58°
13
95°
58°
14
97°
59°
15
96°
59°
16
96°
60°
17
95°
60°
18
92°
59°
19
95°
58°
20
94°
57°
21
93°
55°
22
91°
56°
23
91°
56°
24
92°
55°
25
91°
56°
26
92°
58°
27
96°
55°
28
Hist. Avg.
95°
59°
29
Hist. Avg.
95°
59°
30
Hist. Avg.
95°
59°
31
Hist. Avg.
95°
59°
1
Hist. Avg.
95°
59°
2
Hist. Avg.
94°
59°
3
Hist. Avg.
94°
59°
4
Hist. Avg.
94°
59°
5
Hist. Avg.
94°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Vacaville
Vacaville's August 2026 forecast shows daily high temperatures ranging from 91° to 98°, with overnight lows between 55° and 62°. The average high for August is 95° with an average low of 59°. 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.
