S
M
T
W
T
F
S
30
86°
62°
31
87°
62°
1
86°
59°
2
87°
60°
3
89°
60°
4
84°
61°
5
84°
61°
6
85°
58°
7
89°
62°
8
89°
62°
9
90°
63°
10
90°
63°
11
89°
62°
12
87°
61°
13
84°
62°
14
82°
59°
15
82°
59°
16
85°
62°
17
88°
63°
18
83°
62°
19
80°
61°
20
84°
61°
21
85°
62°
22
83°
56°
23
80°
58°
24
81°
60°
25
82°
56°
26
80°
53°
27
80°
53°
28
79°
54°
29
81°
53°
30
83°
55°
1
83°
58°
2
85°
54°
3
81°
50°
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 79° to 90°, with overnight lows between 50° and 63°. The average high for September is 84° with an average low of 59°. 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.