S
M
T
W
T
F
S
26
76°
52°
27
79°
51°
28
85°
52°
29
87°
52°
30
84°
51°
31
89°
49°
1
92°
50°
2
92°
52°
3
93°
52°
4
84°
52°
5
81°
58°
6
77°
56°
7
78°
54°
8
83°
55°
9
83°
54°
10
84°
49°
11
79°
54°
12
77°
54°
13
78°
56°
14
75°
57°
15
78°
56°
16
86°
55°
17
82°
55°
18
84°
54°
19
83°
55°
20
74°
54°
21
75°
56°
22
81°
53°
23
93°
50°
24
84°
56°
25
79°
55°
26
88°
53°
27
86°
56°
28
68°
56°
29
79°
51°
30
82°
48°
31
70°
49°
1
73°
58°
2
73°
56°
3
68°
59°
4
75°
54°
5
79°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Petaluma
Petaluma'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 Petaluma. See also: September | October | November.
