S
M
T
W
T
F
S
26
80°
59°
27
85°
57°
28
89°
57°
29
84°
59°
30
87°
59°
31
87°
57°
1
85°
58°
2
91°
58°
3
93°
58°
4
85°
57°
5
77°
59°
6
77°
58°
7
77°
57°
8
76°
57°
9
85°
58°
10
78°
57°
11
78°
57°
12
76°
56°
13
72°
58°
14
74°
59°
15
74°
58°
16
81°
57°
17
78°
58°
18
85°
59°
19
86°
58°
20
83°
59°
21
83°
59°
22
86°
58°
23
87°
52°
24
83°
51°
25
84°
50°
26
87°
49°
27
85°
51°
28
85°
50°
29
87°
50°
30
87°
52°
31
86°
51°
1
81°
52°
2
81°
53°
3
86°
54°
4
87°
54°
5
84°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Benicia
Benicia's August 2026 forecast shows daily high temperatures ranging from 81° to 87°, with overnight lows between 49° and 59°. The average high for August is 85° with an average low of 53°. 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 Benicia. See also: September | October | November.