S
M
T
W
T
F
S
30
93°
69°
31
92°
69°
1
91°
63°
2
90°
60°
3
82°
63°
4
87°
69°
5
90°
69°
6
89°
66°
7
90°
67°
8
88°
66°
9
85°
65°
10
86°
59°
11
79°
58°
12
80°
59°
13
82°
64°
14
85°
64°
15
85°
63°
16
81°
64°
17
81°
56°
18
82°
53°
19
76°
53°
20
75°
56°
21
76°
59°
22
78°
62°
23
81°
63°
24
82°
62°
25
83°
52°
26
82°
53°
27
74°
52°
28
73°
50°
29
73°
51°
30
72°
50°
1
Hist. Avg.
76°
53°
2
Hist. Avg.
75°
53°
3
Hist. Avg.
75°
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 72° to 93°, with overnight lows between 50° and 69°. The average high for September is 83° with an average low of 60°. 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.
