S
M
T
W
T
F
S
26
77°
61°
27
81°
63°
28
81°
72°
29
79°
70°
30
74°
62°
31
81°
67°
1
82°
71°
2
82°
71°
3
81°
66°
4
82°
67°
5
82°
69°
6
83°
67°
7
84°
69°
8
84°
70°
9
85°
68°
10
86°
67°
11
82°
68°
12
84°
65°
13
79°
69°
14
84°
66°
15
79°
62°
16
77°
61°
17
77°
67°
18
78°
65°
19
77°
63°
20
76°
61°
21
77°
67°
22
78°
67°
23
77°
63°
24
76°
61°
25
77°
62°
26
76°
61°
27
75°
60°
28
75°
60°
29
76°
59°
30
75°
61°
31
78°
66°
1
80°
67°
2
80°
66°
3
76°
63°
4
75°
60°
5
74°
59°
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 74° to 86°, with overnight lows between 59° and 71°. The average high for August is 79° 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.
