S
M
T
W
T
F
S
30
87°
51°
31
86°
50°
1
86°
51°
2
87°
52°
3
90°
53°
4
90°
55°
5
89°
55°
6
91°
54°
7
91°
55°
8
90°
54°
9
89°
54°
10
85°
53°
11
83°
54°
12
87°
55°
13
88°
56°
14
89°
55°
15
88°
54°
16
84°
52°
17
85°
53°
18
85°
52°
19
87°
52°
20
84°
52°
21
Hist. Avg.
88°
59°
22
Hist. Avg.
88°
59°
23
Hist. Avg.
88°
58°
24
Hist. Avg.
88°
58°
25
Hist. Avg.
87°
58°
26
Hist. Avg.
87°
58°
27
Hist. Avg.
87°
58°
28
Hist. Avg.
86°
57°
29
Hist. Avg.
86°
57°
30
Hist. Avg.
86°
57°
1
Hist. Avg.
85°
56°
2
Hist. Avg.
85°
56°
3
Hist. Avg.
84°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Martinez
Martinez's September 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 50° and 56°. The average high for September is 87° with an average low of 53°. 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 Martinez. See also: October | November | December.
