S
M
T
W
T
F
S
30
89°
57°
31
80°
58°
1
79°
52°
2
83°
54°
3
85°
55°
4
81°
61°
5
85°
53°
6
87°
56°
7
90°
53°
8
97°
56°
9
102°
67°
10
106°
71°
11
95°
61°
12
93°
62°
13
81°
55°
14
88°
53°
15
90°
54°
16
82°
56°
17
77°
52°
18
87°
56°
19
92°
57°
20
81°
54°
21
87°
55°
22
89°
57°
23
94°
58°
24
98°
59°
25
93°
61°
26
90°
60°
27
90°
56°
28
86°
57°
29
86°
56°
30
87°
55°
1
86°
54°
2
83°
58°
3
88°
57°
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 81° to 98°, with overnight lows between 54° and 61°. The average high for September is 89° 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 Lathrop. See also: October | November | December.
