S
M
T
W
T
F
S
26
86°
67°
27
86°
67°
28
85°
66°
29
86°
66°
30
85°
60°
31
79°
59°
1
78°
63°
2
78°
62°
3
80°
63°
4
84°
65°
5
84°
66°
6
85°
66°
7
82°
64°
8
79°
61°
9
79°
62°
10
80°
59°
11
83°
64°
12
84°
65°
13
86°
66°
14
87°
65°
15
86°
66°
16
87°
64°
17
86°
57°
18
79°
56°
19
77°
55°
20
76°
55°
21
77°
56°
22
78°
56°
23
78°
57°
24
79°
56°
25
81°
56°
26
84°
61°
27
83°
55°
28
77°
54°
29
76°
54°
30
77°
56°
31
79°
55°
1
80°
54°
2
76°
53°
3
75°
58°
4
80°
61°
5
82°
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 75° to 87°, with overnight lows between 53° and 67°. The average high for August is 81° 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.
