S
M
T
W
T
F
S
30
79°
70°
31
86°
72°
1
86°
70°
2
82°
66°
3
84°
68°
4
88°
68°
5
81°
66°
6
77°
66°
7
77°
63°
8
83°
68°
9
84°
55°
10
77°
55°
11
79°
63°
12
76°
54°
13
69°
56°
14
68°
53°
15
68°
49°
16
69°
50°
17
67°
47°
18
68°
48°
19
69°
46°
20
66°
49°
21
73°
48°
22
73°
53°
23
76°
53°
24
76°
54°
25
75°
54°
26
75°
53°
27
76°
54°
28
76°
54°
29
74°
53°
30
73°
52°
1
72°
46°
2
62°
42°
3
60°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Postville
Postville's September 2026 forecast shows daily high temperatures ranging from 60° to 84°, with overnight lows between 38° and 68°. The average high for September is 72° with an average low of 52°. 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 Postville. See also: October | November | December.
