S
M
T
W
T
F
S
30
84°
61°
31
76°
61°
1
78°
60°
2
77°
56°
3
76°
52°
4
75°
52°
5
75°
53°
6
77°
54°
7
80°
57°
8
82°
58°
9
81°
58°
10
82°
59°
11
74°
46°
12
73°
50°
13
71°
48°
14
72°
46°
15
73°
51°
16
75°
47°
17
72°
51°
18
73°
48°
19
72°
44°
20
70°
44°
21
70°
45°
22
71°
44°
23
72°
46°
24
73°
52°
25
77°
53°
26
72°
53°
27
72°
52°
28
70°
49°
29
71°
42°
30
71°
45°
1
70°
50°
2
76°
39°
3
77°
38°
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 70° to 84°, with overnight lows between 38° and 61°. The average high for September is 75° with an average low of 50°. 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.