S
M
T
W
T
F
S
30
93°
63°
31
93°
63°
1
91°
62°
2
93°
62°
3
94°
61°
4
93°
62°
5
91°
62°
6
89°
59°
7
94°
62°
8
94°
62°
9
93°
63°
10
95°
63°
11
94°
62°
12
93°
62°
13
90°
60°
14
86°
58°
15
86°
57°
16
89°
61°
17
93°
62°
18
94°
61°
19
93°
60°
20
93°
60°
21
92°
61°
22
92°
59°
23
90°
57°
24
88°
59°
25
90°
60°
26
91°
59°
27
91°
59°
28
90°
58°
29
88°
56°
30
89°
58°
1
87°
54°
2
80°
49°
3
80°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lathrop
Lathrop's September 2026 forecast shows daily high temperatures ranging from 80° to 95°, with overnight lows between 49° and 63°. The average high for September is 91° 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 Lathrop. See also: October | November | December.
