S
M
T
W
T
F
S
26
59°
34°
27
55°
30°
28
52°
28°
29
49°
36°
30
45°
39°
1
47°
42°
2
61°
40°
3
47°
39°
4
60°
40°
5
58°
45°
6
59°
45°
7
54°
44°
8
57°
42°
9
56°
43°
10
57°
43°
11
56°
41°
12
59°
42°
13
55°
40°
14
54°
39°
15
54°
43°
16
55°
41°
17
54°
41°
18
55°
44°
19
55°
45°
20
58°
45°
21
62°
44°
22
58°
44°
23
57°
43°
24
56°
43°
25
57°
46°
26
59°
46°
27
57°
44°
28
58°
42°
29
57°
46°
30
58°
45°
31
58°
44°
1
59°
45°
2
59°
45°
3
60°
44°
4
59°
44°
5
59°
44°
6
60°
45°
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 47° to 62°, with overnight lows between 39° and 46°. The average high for May is 57° with an average low of 43°. 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.
