S
M
T
W
T
F
S
28
83°
49°
29
86°
49°
30
82°
50°
1
79°
50°
2
80°
52°
3
79°
51°
4
81°
51°
5
83°
52°
6
82°
53°
7
82°
54°
8
81°
53°
9
80°
53°
10
76°
51°
11
77°
52°
12
77°
51°
13
78°
53°
14
82°
55°
15
83°
53°
16
82°
53°
17
83°
54°
18
81°
54°
19
78°
55°
20
79°
56°
21
78°
55°
22
78°
56°
23
77°
55°
24
77°
55°
25
78°
54°
26
78°
56°
27
80°
56°
28
80°
55°
29
82°
56°
30
83°
57°
31
82°
56°
1
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Petaluma
Petaluma's July 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 49° and 57°. The average high for July is 80° 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 July weather will actually feel in Petaluma. See also: August | September | October.
