S
M
T
W
T
F
S
30
93°
62°
31
94°
62°
1
95°
63°
2
95°
62°
3
91°
62°
4
92°
61°
5
91°
61°
6
92°
62°
7
89°
62°
8
87°
61°
9
88°
61°
10
89°
60°
11
89°
61°
12
90°
60°
13
91°
59°
14
90°
59°
15
90°
60°
16
89°
59°
17
87°
61°
18
85°
59°
19
91°
61°
20
91°
61°
21
85°
54°
22
85°
55°
23
86°
56°
24
89°
57°
25
89°
57°
26
88°
55°
27
89°
51°
28
82°
50°
29
81°
51°
30
81°
53°
1
85°
52°
2
87°
56°
3
86°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Manteca
Manteca's September 2026 forecast shows daily high temperatures ranging from 81° to 95°, with overnight lows between 50° and 63°. The average high for September is 89° with an average low of 58°. 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 Manteca. See also: October | November | December.
