S
M
T
W
T
F
S
30
78°
61°
31
74°
61°
1
73°
55°
2
76°
50°
3
74°
54°
4
85°
61°
5
73°
57°
6
74°
48°
7
77°
57°
8
85°
60°
9
67°
49°
10
67°
47°
11
69°
52°
12
68°
50°
13
62°
49°
14
64°
49°
15
66°
50°
16
66°
51°
17
64°
50°
18
65°
51°
19
63°
50°
20
66°
49°
21
68°
50°
22
66°
46°
23
69°
49°
24
70°
48°
25
70°
49°
26
69°
44°
27
63°
41°
28
64°
41°
29
63°
40°
30
65°
48°
1
61°
43°
2
59°
41°
3
64°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nittenau
Nittenau's September 2026 forecast shows daily high temperatures ranging from 59° to 85°, with overnight lows between 40° and 60°. The average high for September is 67° with an average low of 48°. 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 Nittenau. See also: October | November | December.