S
M
T
W
T
F
S
30
82°
65°
31
86°
65°
1
87°
64°
2
87°
64°
3
86°
63°
4
85°
63°
5
83°
64°
6
86°
61°
7
83°
57°
8
76°
55°
9
77°
60°
10
76°
62°
11
83°
61°
12
83°
62°
13
84°
61°
14
84°
56°
15
82°
57°
16
73°
56°
17
74°
50°
18
73°
52°
19
74°
48°
20
72°
49°
21
72°
50°
22
73°
56°
23
77°
56°
24
79°
57°
25
79°
58°
26
78°
56°
27
79°
57°
28
77°
53°
29
76°
52°
30
75°
52°
1
74°
51°
2
78°
54°
3
70°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Newark
Newark's September 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 45° and 65°. The average high for September is 79° with an average low of 57°. 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 Newark. See also: October | November | December.
