S
M
T
W
T
F
S
30
70°
53°
31
73°
55°
1
77°
55°
2
76°
53°
3
76°
47°
4
74°
52°
5
74°
45°
6
73°
43°
7
66°
45°
8
67°
51°
9
69°
50°
10
71°
44°
11
68°
48°
12
66°
47°
13
71°
48°
14
67°
49°
15
70°
42°
16
70°
42°
17
Hist. Avg.
65°
44°
18
Hist. Avg.
65°
44°
19
Hist. Avg.
64°
43°
20
Hist. Avg.
64°
43°
21
Hist. Avg.
63°
43°
22
Hist. Avg.
63°
42°
23
Hist. Avg.
63°
42°
24
Hist. Avg.
62°
42°
25
Hist. Avg.
62°
41°
26
Hist. Avg.
62°
41°
27
Hist. Avg.
61°
41°
28
Hist. Avg.
61°
40°
29
Hist. Avg.
60°
40°
30
Hist. Avg.
60°
40°
1
Hist. Avg.
60°
39°
2
Hist. Avg.
59°
39°
3
Hist. Avg.
59°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in New Jersey
New Jersey's September 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 42° and 55°. The average high for September is 71° with an average low of 48°. 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 Jersey. See also: October | November | December.
