S
M
T
W
T
F
S
26
81°
58°
27
81°
56°
28
87°
57°
29
86°
58°
30
88°
58°
31
87°
55°
1
94°
57°
2
96°
57°
3
95°
57°
4
90°
57°
5
83°
58°
6
82°
57°
7
76°
53°
8
81°
56°
9
87°
57°
10
87°
57°
11
87°
57°
12
75°
55°
13
73°
57°
14
72°
60°
15
72°
55°
16
84°
56°
17
84°
56°
18
83°
56°
19
83°
56°
20
82°
55°
21
81°
57°
22
82°
54°
23
92°
58°
24
90°
57°
25
85°
57°
26
92°
56°
27
91°
61°
28
86°
61°
29
81°
56°
30
80°
54°
31
79°
55°
1
72°
60°
2
75°
59°
3
74°
59°
4
75°
54°
5
79°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Vallejo
Vallejo's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August 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 August weather will actually feel in Vallejo. See also: September | October | November.
