S
M
T
W
T
F
S
26
62°
36°
27
70°
41°
28
56°
48°
29
68°
44°
30
68°
51°
1
66°
52°
2
61°
46°
3
60°
50°
4
64°
48°
5
61°
50°
6
55°
48°
7
59°
41°
8
63°
49°
9
68°
45°
10
61°
41°
11
61°
34°
12
63°
37°
13
57°
46°
14
57°
41°
15
59°
39°
16
59°
41°
17
56°
47°
18
55°
52°
19
59°
54°
20
62°
54°
21
61°
52°
22
64°
55°
23
69°
53°
24
70°
55°
25
71°
54°
26
70°
54°
27
67°
52°
28
67°
53°
29
65°
52°
30
59°
52°
31
60°
52°
1
59°
51°
2
60°
51°
3
61°
54°
4
62°
54°
5
64°
55°
6
65°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dartmouth
Dartmouth's May 2026 forecast shows daily high temperatures ranging from 55° to 71°, with overnight lows between 47° and 55°. The average high for May is 63° with an average low of 53°. 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 Dartmouth. See also: June | July | August.
