S
M
T
W
T
F
S
26
67°
35°
27
58°
49°
28
57°
49°
29
64°
43°
30
71°
42°
1
70°
45°
2
73°
50°
3
76°
45°
4
76°
47°
5
62°
53°
6
58°
52°
7
63°
52°
8
58°
47°
9
67°
47°
10
64°
51°
11
68°
49°
12
77°
44°
13
60°
53°
14
59°
49°
15
53°
45°
16
57°
43°
17
63°
43°
18
63°
49°
19
62°
46°
20
65°
46°
21
68°
48°
22
69°
52°
23
69°
52°
24
60°
49°
25
59°
48°
26
60°
47°
27
65°
51°
28
62°
49°
29
63°
48°
30
64°
49°
31
66°
53°
1
74°
57°
2
71°
55°
3
71°
55°
4
68°
54°
5
66°
54°
6
69°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fairhaven
Fairhaven's May 2026 forecast shows daily high temperatures ranging from 59° to 74°, with overnight lows between 46° and 57°. The average high for May is 66° with an average low of 51°. 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 Fairhaven. See also: June | July | August.