S
M
T
W
T
F
S
26
91°
63°
27
92°
62°
28
92°
63°
29
91°
62°
30
92°
63°
31
92°
62°
1
90°
63°
2
91°
62°
3
90°
61°
4
91°
62°
5
92°
61°
6
89°
60°
7
81°
59°
8
89°
60°
9
90°
61°
10
90°
60°
11
89°
60°
12
89°
59°
13
83°
58°
14
87°
59°
15
89°
58°
16
88°
59°
17
89°
57°
18
90°
57°
19
87°
56°
20
88°
52°
21
81°
47°
22
79°
50°
23
80°
52°
24
85°
51°
25
76°
53°
26
77°
55°
27
79°
53°
28
86°
54°
29
86°
54°
30
85°
53°
31
85°
50°
1
84°
47°
2
75°
49°
3
73°
50°
4
79°
50°
5
83°
41°
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 73° to 92°, with overnight lows between 41° and 63°. The average high for August is 86° with an average low of 56°. 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.
