S
M
T
W
T
F
S
30
87°
67°
31
90°
68°
1
93°
70°
2
85°
65°
3
82°
65°
4
81°
67°
5
72°
61°
6
77°
53°
7
75°
61°
8
76°
68°
9
81°
56°
10
76°
56°
11
78°
60°
12
76°
58°
13
69°
57°
14
67°
55°
15
70°
53°
16
72°
57°
17
73°
56°
18
71°
54°
19
70°
51°
20
74°
57°
21
67°
55°
22
67°
56°
23
70°
55°
24
72°
56°
25
72°
55°
26
70°
55°
27
71°
56°
28
73°
56°
29
72°
55°
30
72°
55°
1
69°
51°
2
65°
47°
3
59°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cedar Grove
Cedar Grove's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 43° and 68°. The average high for September is 72° 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 Cedar Grove. See also: October | November | December.