S
M
T
W
T
F
S
26
79°
62°
27
81°
64°
28
83°
65°
29
82°
64°
30
83°
65°
31
81°
65°
1
80°
64°
2
76°
59°
3
75°
57°
4
76°
62°
5
76°
60°
6
77°
62°
7
78°
63°
8
82°
64°
9
82°
64°
10
81°
63°
11
82°
64°
12
81°
63°
13
81°
65°
14
85°
62°
15
85°
64°
16
82°
64°
17
80°
62°
18
84°
64°
19
79°
59°
20
81°
55°
21
76°
53°
22
73°
54°
23
75°
57°
24
77°
56°
25
75°
53°
26
73°
58°
27
75°
54°
28
73°
53°
29
72°
51°
30
73°
51°
31
73°
50°
1
72°
52°
2
72°
53°
3
73°
52°
4
70°
52°
5
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in New Haven
New Haven's August 2026 forecast shows daily high temperatures ranging from 70° to 85°, with overnight lows between 50° and 65°. The average high for August is 78° with an average low of 59°. 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 New Haven. See also: September | October | November.
