S
M
T
W
T
F
S
30
80°
60°
31
82°
51°
1
78°
50°
2
73°
51°
3
74°
57°
4
77°
58°
5
82°
49°
6
76°
48°
7
73°
49°
8
73°
57°
9
75°
56°
10
75°
54°
11
72°
51°
12
71°
50°
13
72°
46°
14
70°
46°
15
70°
51°
16
69°
54°
17
71°
54°
18
78°
55°
19
78°
51°
20
74°
52°
21
76°
49°
22
71°
45°
23
67°
43°
24
66°
42°
25
67°
43°
26
68°
42°
27
74°
50°
28
64°
51°
29
75°
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 64° to 82°, with overnight lows between 41° and 60°. The average high for September is 73° with an average low of 50°. 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.
