S
M
T
W
T
F
S
30
77°
51°
31
78°
55°
1
79°
56°
2
78°
58°
3
79°
56°
4
78°
53°
5
75°
54°
6
78°
53°
7
69°
54°
8
77°
57°
9
78°
57°
10
78°
56°
11
77°
57°
12
77°
57°
13
76°
56°
14
76°
51°
15
74°
52°
16
74°
54°
17
73°
52°
18
71°
48°
19
72°
43°
20
67°
50°
21
69°
42°
22
64°
43°
23
63°
43°
24
65°
48°
25
63°
51°
26
69°
52°
27
69°
51°
28
68°
50°
29
63°
49°
30
65°
39°
1
64°
37°
2
58°
37°
3
56°
36°
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 56° to 79°, with overnight lows between 36° and 58°. The average high for September is 71° with an average low of 50°. 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.
