S
M
T
W
T
F
S
26
77°
50°
27
75°
50°
28
79°
59°
29
78°
58°
30
67°
60°
31
78°
64°
1
74°
61°
2
80°
61°
3
75°
64°
4
82°
63°
5
89°
62°
6
90°
64°
7
91°
65°
8
84°
67°
9
79°
66°
10
82°
65°
11
80°
63°
12
78°
62°
13
79°
58°
14
74°
57°
15
78°
56°
16
74°
55°
17
74°
57°
18
69°
64°
19
78°
64°
20
80°
61°
21
80°
62°
22
75°
61°
23
73°
63°
24
76°
67°
25
81°
61°
26
77°
59°
27
78°
58°
28
80°
65°
29
75°
56°
30
76°
55°
31
70°
55°
1
73°
51°
2
70°
49°
3
68°
57°
4
71°
60°
5
60°
54°
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 ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
