S
M
T
W
T
F
S
26
86°
67°
27
87°
68°
28
86°
68°
29
86°
67°
30
87°
69°
31
87°
70°
1
90°
69°
2
91°
70°
3
92°
70°
4
91°
71°
5
92°
71°
6
91°
70°
7
91°
70°
8
90°
69°
9
87°
69°
10
87°
68°
11
86°
68°
12
88°
69°
13
91°
70°
14
91°
70°
15
90°
69°
16
87°
68°
17
91°
69°
18
92°
68°
19
91°
69°
20
92°
66°
21
91°
68°
22
92°
67°
23
89°
68°
24
90°
67°
25
87°
63°
26
86°
63°
27
86°
62°
28
85°
62°
29
85°
63°
30
86°
63°
31
85°
62°
1
85°
64°
2
86°
62°
3
88°
66°
4
89°
63°
5
89°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sonoma
Sonoma's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 62° and 71°. The average high for August is 89° with an average low of 67°. 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 Sonoma. See also: September | October | November.
