S
M
T
W
T
F
S
26
69°
59°
27
66°
59°
28
71°
55°
29
68°
59°
30
68°
58°
31
66°
55°
1
67°
52°
2
68°
53°
3
67°
56°
4
68°
55°
5
67°
56°
6
66°
57°
7
69°
58°
8
69°
59°
9
66°
58°
10
71°
55°
11
72°
55°
12
72°
56°
13
70°
54°
14
66°
53°
15
66°
53°
16
70°
57°
17
69°
58°
18
68°
55°
19
66°
55°
20
69°
57°
21
70°
58°
22
70°
59°
23
Hist. Avg.
66°
55°
24
Hist. Avg.
66°
55°
25
Hist. Avg.
66°
55°
26
Hist. Avg.
66°
54°
27
Hist. Avg.
66°
54°
28
Hist. Avg.
66°
54°
29
Hist. Avg.
65°
54°
30
Hist. Avg.
65°
54°
31
Hist. Avg.
65°
54°
1
Hist. Avg.
65°
54°
2
Hist. Avg.
65°
54°
3
Hist. Avg.
65°
54°
4
Hist. Avg.
65°
54°
5
Hist. Avg.
65°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Dartmouth
Dartmouth's August 2026 forecast shows daily high temperatures ranging from 66° to 72°, with overnight lows between 52° and 59°. The average high for August is 68° 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.
