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
77°
63°
9
82°
63°
10
77°
55°
11
80°
63°
12
78°
51°
13
65°
50°
14
65°
64°
15
68°
55°
16
67°
55°
17
74°
49°
18
68°
51°
19
65°
49°
20
69°
48°
21
71°
51°
22
71°
53°
23
72°
51°
24
71°
46°
25
75°
54°
26
75°
54°
27
74°
53°
28
74°
53°
29
72°
51°
30
73°
48°
1
66°
47°
2
69°
49°
3
71°
50°
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 65° to 80°, with overnight lows between 46° and 64°. The average high for September is 71° 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.
