S
M
T
W
T
F
S
26
85°
70°
27
90°
70°
28
91°
71°
29
91°
71°
30
90°
70°
31
90°
69°
1
89°
70°
2
89°
70°
3
90°
69°
4
91°
70°
5
91°
71°
6
92°
70°
7
86°
63°
8
91°
65°
9
89°
63°
10
86°
62°
11
84°
61°
12
85°
62°
13
88°
66°
14
89°
67°
15
89°
67°
16
85°
66°
17
84°
63°
18
87°
66°
19
87°
66°
20
83°
65°
21
84°
65°
22
84°
61°
23
86°
61°
24
89°
63°
25
89°
65°
26
90°
65°
27
90°
63°
28
89°
62°
29
87°
63°
30
85°
64°
31
84°
60°
1
81°
59°
2
82°
58°
3
81°
57°
4
80°
56°
5
81°
58°
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 80° to 92°, with overnight lows between 56° and 71°. The average high for August is 87° 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.
