S
M
T
W
T
F
S
26
60°
46°
27
70°
45°
28
60°
49°
29
62°
53°
30
70°
50°
1
67°
45°
2
62°
50°
3
64°
43°
4
77°
57°
5
83°
63°
6
75°
56°
7
61°
48°
8
65°
51°
9
67°
51°
10
75°
57°
11
67°
50°
12
65°
45°
13
71°
52°
14
73°
55°
15
74°
53°
16
76°
55°
17
77°
54°
18
79°
59°
19
79°
58°
20
78°
60°
21
79°
60°
22
76°
52°
23
70°
52°
24
71°
53°
25
72°
55°
26
73°
54°
27
72°
53°
28
73°
56°
29
74°
54°
30
73°
59°
31
76°
63°
1
80°
62°
2
75°
59°
3
76°
61°
4
80°
63°
5
81°
64°
6
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bar Harbor
Bar Harbor's May 2026 forecast shows daily high temperatures ranging from 61° to 83°, with overnight lows between 45° and 64°. The average high for May is 74° with an average low of 56°. 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 Bar Harbor. See also: June | July | August.
