S
M
T
W
T
F
S
30
80°
53°
31
69°
55°
1
73°
60°
2
72°
59°
3
73°
58°
4
76°
55°
5
75°
51°
6
81°
53°
7
92°
52°
8
98°
57°
9
92°
64°
10
100°
70°
11
86°
58°
12
81°
57°
13
78°
58°
14
87°
53°
15
86°
53°
16
70°
56°
17
73°
61°
18
83°
54°
19
72°
53°
20
74°
55°
21
75°
56°
22
78°
56°
23
77°
51°
24
92°
57°
25
82°
62°
26
72°
51°
27
76°
53°
28
80°
49°
29
92°
52°
30
81°
57°
1
87°
54°
2
90°
57°
3
89°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Martinez
Martinez's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
