S
M
T
W
T
F
S
30
81°
52°
31
75°
53°
1
77°
53°
2
78°
57°
3
79°
58°
4
80°
55°
5
78°
55°
6
79°
57°
7
79°
55°
8
78°
54°
9
78°
54°
10
77°
54°
11
78°
54°
12
78°
53°
13
Hist. Avg.
72°
52°
14
Hist. Avg.
71°
52°
15
Hist. Avg.
71°
52°
16
Hist. Avg.
71°
51°
17
Hist. Avg.
70°
51°
18
Hist. Avg.
70°
51°
19
Hist. Avg.
70°
50°
20
Hist. Avg.
69°
50°
21
Hist. Avg.
69°
50°
22
Hist. Avg.
69°
49°
23
Hist. Avg.
68°
49°
24
Hist. Avg.
68°
48°
25
Hist. Avg.
68°
48°
26
Hist. Avg.
67°
48°
27
Hist. Avg.
67°
47°
28
Hist. Avg.
67°
47°
29
Hist. Avg.
66°
47°
30
Hist. Avg.
66°
46°
1
Hist. Avg.
66°
46°
2
Hist. Avg.
65°
45°
3
Hist. Avg.
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in New Haven District
New Haven District's September 2026 forecast shows daily high temperatures ranging from 75° to 81°, with overnight lows between 52° and 58°. The average high for September is 78° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in New Haven District. See also: October | November | December.
