S
M
T
W
T
F
S
26
88°
71°
27
83°
73°
28
82°
72°
29
83°
73°
30
91°
72°
1
86°
74°
2
92°
66°
3
78°
66°
4
80°
65°
5
84°
67°
6
87°
70°
7
91°
71°
8
84°
69°
9
85°
70°
10
87°
71°
11
86°
70°
12
85°
69°
13
87°
70°
14
85°
68°
15
88°
67°
16
83°
69°
17
84°
68°
18
86°
70°
19
88°
70°
20
88°
69°
21
86°
70°
22
84°
68°
23
84°
66°
24
85°
69°
25
85°
71°
26
86°
72°
27
85°
71°
28
85°
71°
29
86°
72°
30
85°
71°
31
84°
72°
1
85°
72°
2
86°
72°
3
86°
73°
4
87°
72°
5
86°
72°
6
86°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Merritt Island
Merritt Island's May 2026 forecast shows daily high temperatures ranging from 78° to 92°, with overnight lows between 65° and 73°. The average high for May is 86° with an average low of 70°. 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 Merritt Island. See also: June | July | August.
