S
M
T
W
T
F
S
26
87°
66°
27
86°
66°
28
88°
67°
29
87°
67°
30
88°
66°
31
86°
66°
1
80°
65°
2
80°
63°
3
81°
62°
4
79°
65°
5
80°
65°
6
81°
64°
7
81°
63°
8
83°
63°
9
84°
64°
10
84°
65°
11
85°
64°
12
86°
64°
13
85°
63°
14
88°
63°
15
89°
64°
16
87°
64°
17
81°
63°
18
82°
64°
19
84°
61°
20
83°
56°
21
81°
55°
22
79°
56°
23
81°
56°
24
81°
55°
25
80°
55°
26
80°
61°
27
83°
59°
28
83°
57°
29
80°
58°
30
82°
57°
31
80°
55°
1
78°
57°
2
79°
60°
3
78°
57°
4
78°
53°
5
79°
54°
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 78° to 89°, with overnight lows between 53° and 67°. The average high for August is 83° with an average low of 61°. 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.
