S
M
T
W
T
F
S
30
74°
51°
31
73°
50°
1
74°
51°
2
74°
54°
3
75°
55°
4
74°
57°
5
74°
57°
6
76°
58°
7
81°
58°
8
80°
57°
9
78°
56°
10
75°
56°
11
77°
57°
12
75°
56°
13
72°
55°
14
70°
54°
15
69°
54°
16
69°
53°
17
70°
54°
18
68°
54°
19
73°
52°
20
69°
51°
21
78°
52°
22
78°
45°
23
74°
40°
24
66°
42°
25
68°
49°
26
71°
48°
27
70°
51°
28
74°
49°
29
74°
47°
30
73°
48°
1
72°
49°
2
73°
47°
3
73°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Concord
Concord's September 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 40° and 58°. The average high for September is 73° 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 Concord. See also: October | November | December.