S
M
T
W
T
F
S
26
59°
46°
27
66°
46°
28
57°
46°
29
61°
45°
30
57°
52°
1
59°
52°
2
55°
48°
3
59°
48°
4
59°
46°
5
59°
48°
6
57°
46°
7
57°
41°
8
61°
46°
9
63°
54°
10
61°
46°
11
55°
45°
12
57°
48°
13
55°
48°
14
52°
46°
15
54°
46°
16
57°
48°
17
54°
49°
18
56°
52°
19
59°
53°
20
60°
54°
21
63°
56°
22
63°
56°
23
67°
55°
24
66°
52°
25
65°
51°
26
65°
53°
27
64°
52°
28
66°
52°
29
64°
51°
30
56°
55°
31
57°
54°
1
56°
55°
2
57°
55°
3
57°
56°
4
58°
57°
5
60°
57°
6
61°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mullion
Mullion's May 2026 forecast shows daily high temperatures ranging from 54° to 67°, with overnight lows between 49° and 57°. The average high for May is 61° with an average low of 54°. 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 Mullion. See also: June | July | August.