S
M
T
W
T
F
S
30
107°
88°
31
104°
88°
1
102°
78°
2
101°
77°
3
100°
76°
4
100°
78°
5
96°
78°
6
101°
81°
7
102°
81°
8
96°
80°
9
95°
78°
10
101°
78°
11
101°
80°
12
103°
79°
13
100°
79°
14
102°
75°
15
105°
81°
16
106°
82°
17
106°
81°
18
105°
80°
19
104°
77°
20
104°
77°
21
103°
76°
22
103°
78°
23
102°
78°
24
103°
77°
25
98°
68°
26
92°
68°
27
91°
67°
28
92°
67°
29
94°
68°
30
94°
70°
1
95°
71°
2
96°
73°
3
99°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Martinez Lake
Martinez Lake's September 2026 forecast shows daily high temperatures ranging from 91° to 106°, with overnight lows between 67° and 82°. The average high for September is 100° with an average low of 76°. 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 Lake. See also: October | November | December.
