S
M
T
W
T
F
S
30
83°
55°
31
67°
56°
1
75°
57°
2
79°
60°
3
75°
56°
4
80°
55°
5
82°
55°
6
85°
57°
7
92°
58°
8
90°
62°
9
93°
64°
10
94°
61°
11
93°
60°
12
88°
60°
13
87°
61°
14
86°
58°
15
86°
60°
16
82°
59°
17
88°
60°
18
87°
57°
19
81°
55°
20
83°
60°
21
84°
57°
22
87°
57°
23
81°
58°
24
79°
54°
25
78°
55°
26
78°
54°
27
77°
53°
28
78°
53°
29
79°
54°
30
78°
57°
1
77°
53°
2
78°
55°
3
84°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Contra Costa Centre
Contra Costa Centre's September 2026 forecast shows daily high temperatures ranging from 75° to 94°, with overnight lows between 53° and 64°. The average high for September is 83° with an average low of 57°. 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 Contra Costa Centre. See also: October | November | December.
