S
M
T
W
T
F
S
30
81°
60°
31
82°
60°
1
84°
54°
2
82°
50°
3
73°
58°
4
76°
59°
5
77°
52°
6
83°
46°
7
74°
46°
8
72°
49°
9
73°
55°
10
74°
57°
11
73°
56°
12
79°
53°
13
80°
46°
14
71°
44°
15
69°
43°
16
70°
44°
17
69°
49°
18
72°
43°
19
77°
42°
20
68°
47°
21
69°
53°
22
75°
47°
23
77°
52°
24
76°
53°
25
76°
52°
26
77°
52°
27
76°
49°
28
75°
44°
29
64°
47°
30
62°
47°
1
71°
46°
2
71°
50°
3
60°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Appleton
Appleton's September 2026 forecast shows daily high temperatures ranging from 60° to 84°, with overnight lows between 37° and 60°. The average high for September is 74° 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 Appleton. See also: October | November | December.
