S
M
T
W
T
F
S
30
74°
52°
31
74°
53°
1
75°
51°
2
73°
50°
3
74°
51°
4
75°
54°
5
75°
56°
6
73°
51°
7
73°
53°
8
74°
56°
9
73°
49°
10
73°
48°
11
74°
52°
12
75°
53°
13
74°
47°
14
71°
55°
15
76°
56°
16
80°
56°
17
77°
54°
18
77°
44°
19
70°
44°
20
67°
45°
21
68°
44°
22
72°
52°
23
74°
53°
24
75°
49°
25
74°
41°
26
71°
42°
27
64°
41°
28
63°
40°
29
64°
41°
30
Hist. Avg.
71°
46°
1
Hist. Avg.
71°
46°
2
Hist. Avg.
70°
46°
3
Hist. Avg.
70°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Postville
Postville's September 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 40° and 56°. The average high for September is 73° with an average low of 49°. 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.
