S
M
T
W
T
F
S
30
72°
55°
31
73°
53°
1
73°
52°
2
70°
52°
3
73°
53°
4
72°
52°
5
73°
54°
6
72°
55°
7
70°
52°
8
72°
54°
9
73°
50°
10
69°
49°
11
73°
49°
12
74°
55°
13
72°
53°
14
68°
53°
15
74°
56°
16
76°
57°
17
75°
56°
18
75°
47°
19
73°
46°
20
69°
46°
21
64°
51°
22
65°
52°
23
70°
51°
24
66°
52°
25
66°
44°
26
67°
42°
27
61°
44°
28
60°
43°
29
61°
43°
30
60°
41°
1
Hist. Avg.
64°
45°
2
Hist. Avg.
63°
44°
3
Hist. Avg.
63°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Neenah
Neenah's September 2026 forecast shows daily high temperatures ranging from 60° to 76°, with overnight lows between 41° and 57°. The average high for September is 70° 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 Neenah. See also: October | November | December.
