S
M
T
W
T
F
S
30
74°
56°
31
77°
59°
1
75°
52°
2
79°
51°
3
72°
50°
4
70°
50°
5
70°
51°
6
72°
56°
7
79°
60°
8
81°
59°
9
77°
51°
10
72°
52°
11
72°
57°
12
73°
50°
13
76°
49°
14
70°
46°
15
69°
48°
16
70°
53°
17
73°
49°
18
77°
45°
19
69°
52°
20
71°
46°
21
69°
53°
22
68°
54°
23
77°
54°
24
77°
53°
25
76°
54°
26
76°
53°
27
75°
52°
28
75°
51°
29
73°
51°
30
74°
52°
1
75°
44°
2
75°
40°
3
72°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oelwein
Oelwein's September 2026 forecast shows daily high temperatures ranging from 68° to 81°, with overnight lows between 40° and 60°. The average high for September is 74° with an average low of 51°. 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 Oelwein. See also: October | November | December.
