S
M
T
W
T
F
S
26
58°
50°
27
57°
42°
28
59°
42°
29
58°
42°
30
59°
43°
1
61°
51°
2
60°
50°
3
61°
51°
4
57°
54°
5
62°
56°
6
61°
49°
7
62°
48°
8
64°
50°
9
63°
48°
10
70°
49°
11
69°
50°
12
70°
49°
13
69°
50°
14
58°
43°
15
55°
46°
16
54°
45°
17
54°
43°
18
53°
47°
19
54°
43°
20
54°
46°
21
56°
47°
22
59°
48°
23
61°
49°
24
63°
48°
25
62°
48°
26
58°
47°
27
56°
47°
28
55°
46°
29
55°
46°
30
56°
45°
31
55°
46°
1
56°
46°
2
56°
45°
3
57°
48°
4
58°
48°
5
56°
47°
6
56°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mendocino
Mendocino's May 2026 forecast shows daily high temperatures ranging from 53° to 70°, with overnight lows between 43° and 56°. The average high for May is 59° with an average low of 48°. 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 Mendocino. See also: June | July | August.
