S
M
T
W
T
F
S
30
82°
68°
31
91°
70°
1
89°
70°
2
85°
68°
3
80°
67°
4
82°
68°
5
82°
65°
6
81°
62°
7
74°
60°
8
75°
59°
9
78°
57°
10
74°
55°
11
72°
53°
12
71°
53°
13
70°
55°
14
72°
51°
15
76°
57°
16
76°
57°
17
75°
56°
18
73°
57°
19
75°
57°
20
75°
56°
21
74°
57°
22
76°
57°
23
75°
56°
24
74°
56°
25
74°
55°
26
73°
55°
27
74°
54°
28
74°
54°
29
72°
53°
30
71°
53°
1
71°
52°
2
72°
52°
3
71°
51°
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 70° to 89°, with overnight lows between 51° and 70°. The average high for September is 75° with an average low of 57°. 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.
