S
M
T
W
T
F
S
30
79°
55°
31
79°
54°
1
78°
52°
2
78°
50°
3
76°
50°
4
75°
51°
5
71°
44°
6
69°
51°
7
71°
52°
8
76°
52°
9
77°
53°
10
68°
46°
11
66°
46°
12
69°
47°
13
73°
53°
14
76°
52°
15
77°
48°
16
67°
43°
17
66°
48°
18
72°
46°
19
66°
44°
20
74°
53°
21
74°
50°
22
Hist. Avg.
69°
51°
23
Hist. Avg.
69°
50°
24
Hist. Avg.
68°
50°
25
Hist. Avg.
68°
50°
26
Hist. Avg.
68°
50°
27
Hist. Avg.
67°
49°
28
Hist. Avg.
67°
49°
29
Hist. Avg.
66°
49°
30
Hist. Avg.
66°
49°
1
Hist. Avg.
66°
48°
2
Hist. Avg.
65°
48°
3
Hist. Avg.
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cedar Grove
Cedar Grove's September 2026 forecast shows daily high temperatures ranging from 66° to 79°, with overnight lows between 43° and 55°. The average high for September is 73° 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.