S
M
T
W
T
F
S
30
78°
65°
31
72°
61°
1
75°
56°
2
76°
55°
3
78°
55°
4
86°
66°
5
N/A
6
76°
56°
7
86°
61°
8
79°
57°
9
71°
50°
10
71°
49°
11
69°
55°
12
70°
52°
13
67°
51°
14
68°
54°
15
69°
54°
16
71°
53°
17
72°
51°
18
69°
48°
19
65°
50°
20
69°
50°
21
68°
54°
22
70°
53°
23
70°
53°
24
71°
52°
25
71°
50°
26
69°
46°
27
65°
44°
28
66°
44°
29
66°
45°
30
65°
51°
1
65°
47°
2
61°
46°
3
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Oppenheim
Oppenheim's September 2026 forecast shows daily high temperatures ranging from 61° to 86°, with overnight lows between 44° and 61°. The average high for September is 69° 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 Oppenheim. See also: October | November | December.
