S
M
T
W
T
F
S
30
82°
71°
31
91°
72°
1
94°
72°
2
92°
70°
3
92°
70°
4
92°
69°
5
89°
68°
6
83°
66°
7
83°
68°
8
88°
68°
9
85°
61°
10
81°
59°
11
75°
55°
12
77°
57°
13
75°
56°
14
72°
53°
15
76°
51°
16
80°
57°
17
79°
57°
18
73°
54°
19
77°
56°
20
79°
56°
21
77°
55°
22
78°
54°
23
75°
54°
24
77°
53°
25
74°
54°
26
69°
46°
27
65°
42°
28
63°
41°
29
64°
44°
30
63°
40°
1
64°
49°
2
65°
47°
3
62°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Porte City
La Porte City's September 2026 forecast shows daily high temperatures ranging from 62° to 92°, with overnight lows between 40° and 70°. The average high for September is 76° with an average low of 56°. 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 La Porte City. See also: October | November | December.
