S
M
T
W
T
F
S
28
91°
74°
29
93°
75°
30
93°
76°
1
92°
75°
2
92°
75°
3
93°
74°
4
92°
75°
5
88°
75°
6
88°
74°
7
90°
75°
8
88°
75°
9
89°
74°
10
89°
75°
11
91°
75°
12
89°
74°
13
93°
75°
14
92°
74°
15
89°
75°
16
90°
74°
17
90°
72°
18
90°
75°
19
Hist. Avg.
91°
73°
20
Hist. Avg.
91°
73°
21
Hist. Avg.
91°
73°
22
Hist. Avg.
91°
73°
23
Hist. Avg.
91°
73°
24
Hist. Avg.
91°
73°
25
Hist. Avg.
91°
73°
26
Hist. Avg.
91°
73°
27
Hist. Avg.
91°
73°
28
Hist. Avg.
91°
73°
29
Hist. Avg.
91°
73°
30
Hist. Avg.
91°
73°
31
Hist. Avg.
91°
73°
1
Hist. Avg.
91°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
July Weather in Petaluma
Petaluma's July 2026 forecast shows daily high temperatures ranging from 88° to 93°, with overnight lows between 72° and 76°. The average high for July is 91° with an average low of 75°. 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.
