S
M
T
W
T
F
S
30
83°
69°
31
93°
68°
1
96°
71°
2
96°
72°
3
98°
71°
4
95°
71°
5
94°
67°
6
85°
65°
7
84°
65°
8
87°
66°
9
90°
64°
10
91°
66°
11
89°
62°
12
84°
61°
13
86°
61°
14
87°
66°
15
86°
65°
16
81°
65°
17
79°
64°
18
83°
64°
19
80°
61°
20
79°
58°
21
79°
58°
22
80°
60°
23
81°
60°
24
84°
63°
25
84°
62°
26
77°
61°
27
76°
62°
28
78°
61°
29
76°
60°
30
78°
60°
1
75°
59°
2
74°
59°
3
76°
58°
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 74° to 98°, with overnight lows between 58° and 72°. The average high for September is 84° with an average low of 63°. 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.