S
M
T
W
T
F
S
30
91°
65°
31
88°
67°
1
90°
64°
2
88°
65°
3
89°
62°
4
90°
66°
5
90°
67°
6
87°
59°
7
85°
56°
8
83°
57°
9
83°
58°
10
85°
59°
11
89°
60°
12
91°
58°
13
88°
61°
14
90°
62°
15
90°
57°
16
88°
56°
17
85°
58°
18
88°
60°
19
89°
62°
20
88°
58°
21
86°
60°
22
83°
57°
23
78°
54°
24
75°
57°
25
78°
59°
26
78°
57°
27
77°
57°
28
77°
59°
29
78°
54°
30
76°
56°
1
75°
55°
2
75°
51°
3
73°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stockton
Stockton's September 2026 forecast shows daily high temperatures ranging from 73° to 91°, with overnight lows between 51° and 67°. 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 Stockton. See also: October | November | December.
