S
M
T
W
T
F
S
26
81°
56°
27
81°
54°
28
71°
60°
29
81°
62°
30
70°
55°
1
67°
50°
2
67°
42°
3
69°
42°
4
78°
52°
5
79°
59°
6
78°
62°
7
68°
41°
8
71°
46°
9
75°
53°
10
76°
56°
11
78°
52°
12
77°
54°
13
77°
57°
14
76°
55°
15
81°
54°
16
76°
55°
17
79°
58°
18
79°
59°
19
81°
59°
20
79°
60°
21
77°
56°
22
77°
52°
23
75°
52°
24
75°
53°
25
77°
56°
26
78°
54°
27
76°
53°
28
77°
55°
29
78°
57°
30
81°
61°
31
80°
62°
1
80°
63°
2
79°
62°
3
80°
61°
4
80°
60°
5
84°
64°
6
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sonoma
Sonoma's May 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 41° and 65°. The average high for May is 77° with an average low of 56°. 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 Sonoma. See also: June | July | August.
