S
M
T
W
T
F
S
30
86°
54°
31
87°
58°
1
88°
52°
2
83°
51°
3
79°
51°
4
81°
52°
5
83°
54°
6
81°
52°
7
80°
48°
8
75°
50°
9
75°
49°
10
77°
52°
11
80°
49°
12
86°
49°
13
76°
56°
14
85°
60°
15
86°
53°
16
84°
48°
17
75°
47°
18
76°
48°
19
82°
46°
20
81°
50°
21
81°
57°
22
80°
54°
23
74°
51°
24
69°
49°
25
72°
52°
26
74°
51°
27
74°
52°
28
75°
53°
29
74°
53°
30
68°
46°
1
67°
41°
2
66°
41°
3
66°
42°
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 66° to 88°, with overnight lows between 41° and 60°. The average high for September is 78° with an average low of 51°. 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.
