S
M
T
W
T
F
S
30
82°
63°
31
79°
69°
1
84°
68°
2
72°
65°
3
88°
67°
4
85°
73°
5
80°
68°
6
76°
58°
7
79°
61°
8
84°
66°
9
85°
72°
10
88°
65°
11
81°
59°
12
78°
63°
13
83°
62°
14
83°
61°
15
79°
61°
16
78°
59°
17
75°
62°
18
78°
59°
19
76°
60°
20
80°
61°
21
78°
62°
22
71°
62°
23
71°
61°
24
72°
61°
25
74°
58°
26
77°
57°
27
73°
54°
28
72°
57°
29
77°
60°
30
78°
60°
1
77°
59°
2
76°
59°
3
75°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Passaic
Passaic's September 2026 forecast shows daily high temperatures ranging from 71° to 88°, with overnight lows between 54° and 72°. The average high for September is 78° with an average low of 61°. 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 Passaic. See also: October | November | December.
