S
M
T
W
T
F
S
30
92°
65°
31
92°
63°
1
94°
64°
2
92°
65°
3
93°
64°
4
94°
58°
5
93°
56°
6
82°
54°
7
85°
59°
8
89°
60°
9
90°
51°
10
85°
49°
11
79°
49°
12
79°
51°
13
78°
58°
14
79°
48°
15
88°
46°
16
78°
46°
17
76°
47°
18
76°
46°
19
75°
45°
20
74°
45°
21
75°
46°
22
76°
46°
23
77°
49°
24
79°
52°
25
80°
52°
26
83°
50°
27
81°
55°
28
76°
43°
29
83°
46°
30
73°
49°
1
74°
43°
2
75°
47°
3
72°
50°
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 72° to 94°, with overnight lows between 43° and 65°. The average high for September is 82° with an average low of 52°. 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.
