S
M
T
W
T
F
S
30
79°
55°
31
78°
55°
1
78°
56°
2
79°
56°
3
77°
57°
4
76°
56°
5
79°
56°
6
78°
55°
7
76°
54°
8
75°
52°
9
75°
53°
10
76°
58°
11
74°
52°
12
74°
52°
13
77°
51°
14
77°
57°
15
76°
57°
16
76°
54°
17
73°
50°
18
72°
49°
19
72°
50°
20
77°
55°
21
74°
50°
22
71°
51°
23
76°
53°
24
75°
54°
25
76°
53°
26
71°
45°
27
73°
47°
28
67°
46°
29
66°
45°
30
68°
45°
1
67°
45°
2
Hist. Avg.
70°
47°
3
Hist. Avg.
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cedar Knolls
Cedar Knolls's September 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 45° and 58°. The average high for September is 74° with an average low of 52°. 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 Cedar Knolls. See also: October | November | December.
