S
M
T
W
T
F
S
26
61°
31°
27
63°
34°
28
57°
32°
29
44°
39°
30
46°
41°
1
59°
36°
2
50°
30°
3
45°
39°
4
59°
36°
5
58°
45°
6
55°
49°
7
61°
40°
8
54°
38°
9
51°
44°
10
52°
45°
11
54°
43°
12
59°
39°
13
60°
41°
14
61°
41°
15
62°
46°
16
65°
47°
17
64°
44°
18
62°
45°
19
63°
45°
20
62°
44°
21
61°
45°
22
62°
45°
23
63°
46°
24
67°
49°
25
70°
50°
26
70°
51°
27
72°
44°
28
64°
43°
29
63°
46°
30
65°
48°
31
71°
52°
1
73°
52°
2
68°
51°
3
69°
52°
4
73°
53°
5
68°
53°
6
74°
52°
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 51° to 74°, with overnight lows between 38° and 53°. The average high for May is 64° with an average low of 46°. 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.
