S
M
T
W
T
F
S
26
77°
61°
27
81°
63°
28
81°
72°
29
79°
70°
30
75°
68°
31
81°
64°
1
84°
66°
2
82°
73°
3
82°
73°
4
82°
61°
5
82°
61°
6
88°
75°
7
88°
73°
8
88°
72°
9
90°
75°
10
82°
66°
11
84°
70°
12
86°
67°
13
84°
67°
14
84°
64°
15
82°
65°
16
81°
70°
17
81°
66°
18
81°
65°
19
83°
67°
20
82°
65°
21
83°
66°
22
83°
67°
23
82°
64°
24
79°
62°
25
78°
64°
26
81°
66°
27
83°
67°
28
75°
59°
29
75°
59°
30
78°
65°
31
81°
66°
1
78°
65°
2
81°
66°
3
82°
66°
4
81°
65°
5
81°
65°
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 86°, with overnight lows between 59° and 70°. The average high for August is 81° with an average low of 65°. 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.
