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
78°
50°
5
87°
58°
6
74°
60°
7
64°
48°
8
71°
53°
9
66°
50°
10
78°
53°
11
62°
48°
12
65°
46°
13
63°
49°
14
64°
47°
15
68°
50°
16
78°
54°
17
74°
54°
18
80°
58°
19
80°
59°
20
76°
55°
21
69°
52°
22
69°
53°
23
70°
53°
24
71°
52°
25
72°
55°
26
76°
59°
27
75°
56°
28
76°
58°
29
77°
55°
30
80°
61°
31
82°
62°
1
77°
63°
2
82°
61°
3
82°
63°
4
83°
64°
5
83°
64°
6
84°
63°
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 62° to 84°, with overnight lows between 46° and 64°. The average high for May is 74° with an average low of 55°. 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.
