S
M
T
W
T
F
S
26
60°
50°
27
64°
45°
28
70°
42°
29
71°
49°
30
74°
45°
1
72°
50°
2
60°
52°
3
63°
52°
4
64°
44°
5
63°
52°
6
68°
54°
7
64°
51°
8
66°
50°
9
73°
45°
10
76°
51°
11
74°
49°
12
64°
50°
13
69°
48°
14
73°
47°
15
73°
48°
16
73°
47°
17
75°
46°
18
85°
55°
19
88°
46°
20
86°
46°
21
82°
45°
22
75°
51°
23
72°
50°
24
72°
49°
25
69°
48°
26
77°
49°
27
79°
54°
28
77°
52°
29
84°
51°
30
80°
49°
31
79°
50°
1
78°
50°
2
80°
51°
3
80°
52°
4
76°
49°
5
71°
51°
6
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in East Petaluma
East Petaluma's May 2026 forecast shows daily high temperatures ranging from 69° to 84°, with overnight lows between 48° and 54°. The average high for May is 76° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in East Petaluma. See also: June | July | August.
