S
M
T
W
T
F
S
26
72°
58°
27
74°
57°
28
73°
61°
29
77°
60°
30
78°
59°
31
79°
60°
1
78°
59°
2
80°
58°
3
74°
56°
4
73°
55°
5
73°
54°
6
71°
55°
7
74°
56°
8
78°
57°
9
77°
60°
10
76°
60°
11
78°
59°
12
72°
60°
13
73°
60°
14
75°
61°
15
79°
56°
16
77°
56°
17
76°
54°
18
73°
53°
19
72°
52°
20
71°
53°
21
74°
54°
22
72°
57°
23
74°
56°
24
71°
58°
25
77°
58°
26
74°
56°
27
74°
56°
28
75°
52°
29
70°
52°
30
70°
57°
31
71°
54°
1
71°
52°
2
72°
50°
3
70°
54°
4
69°
51°
5
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dartmouth
Dartmouth's August 2026 forecast shows daily high temperatures ranging from 69° to 80°, with overnight lows between 50° and 61°. The average high for August 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 August weather will actually feel in Dartmouth. See also: September | October | November.
