S
M
T
W
T
F
S
30
91°
56°
31
91°
61°
1
92°
62°
2
97°
62°
3
96°
57°
4
90°
59°
5
90°
56°
6
92°
55°
7
90°
54°
8
89°
55°
9
91°
57°
10
95°
59°
11
96°
61°
12
96°
62°
13
98°
61°
14
97°
55°
15
91°
55°
16
91°
57°
17
93°
59°
18
94°
61°
19
96°
58°
20
96°
58°
21
94°
59°
22
90°
55°
23
87°
52°
24
86°
51°
25
85°
51°
26
84°
53°
27
85°
56°
28
87°
55°
29
91°
51°
30
85°
51°
1
Hist. Avg.
88°
54°
2
Hist. Avg.
87°
54°
3
Hist. Avg.
87°
54°
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 84° to 98°, with overnight lows between 51° and 62°. The average high for September is 91° with an average low of 57°. 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.
