S
M
T
W
T
F
S
26
76°
48°
27
82°
48°
28
78°
60°
29
74°
54°
30
64°
42°
1
68°
39°
2
72°
37°
3
64°
30°
4
80°
41°
5
74°
54°
6
81°
54°
7
65°
43°
8
73°
36°
9
75°
49°
10
82°
46°
11
71°
48°
12
77°
41°
13
79°
51°
14
65°
43°
15
79°
40°
16
85°
59°
17
89°
54°
18
90°
67°
19
89°
66°
20
87°
64°
21
76°
64°
22
84°
61°
23
82°
69°
24
77°
67°
25
79°
67°
26
85°
68°
27
86°
68°
28
85°
64°
29
84°
60°
30
82°
57°
31
85°
65°
1
82°
57°
2
80°
54°
3
82°
55°
4
83°
57°
5
82°
62°
6
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Eastport
Eastport's May 2026 forecast shows daily high temperatures ranging from 80° to 85°, with overnight lows between 54° and 66°. The average high for May is 83° with an average low of 59°. 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 Eastport. See also: June | July | August.