S
M
T
W
T
F
S
30
93°
72°
31
96°
73°
1
97°
73°
2
99°
74°
3
100°
76°
4
102°
76°
5
102°
76°
6
97°
74°
7
97°
76°
8
93°
76°
9
96°
73°
10
98°
72°
11
90°
74°
12
93°
74°
13
94°
71°
14
98°
71°
15
97°
72°
16
95°
76°
17
94°
71°
18
99°
71°
19
95°
70°
20
93°
70°
21
93°
71°
22
89°
71°
23
87°
69°
24
84°
63°
25
85°
61°
26
84°
60°
27
84°
61°
28
83°
61°
29
82°
63°
30
81°
64°
1
83°
61°
2
82°
58°
3
81°
63°
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 81° to 95°, with overnight lows between 58° and 71°. The average high for September is 86° with an average low of 64°. 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.