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