S
M
T
W
T
F
S
30
79°
61°
31
73°
58°
1
72°
57°
2
76°
61°
3
76°
61°
4
79°
60°
5
79°
61°
6
77°
61°
7
79°
52°
8
73°
61°
9
76°
50°
10
77°
49°
11
69°
52°
12
72°
59°
13
74°
47°
14
76°
43°
15
66°
45°
16
67°
45°
17
67°
48°
18
68°
55°
19
66°
54°
20
72°
53°
21
74°
53°
22
76°
55°
23
77°
54°
24
76°
53°
25
75°
55°
26
75°
43°
27
71°
41°
28
66°
40°
29
60°
42°
30
62°
41°
1
61°
42°
2
63°
41°
3
65°
44°
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 79°, with overnight lows between 40° and 61°. The average high for September is 72° 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 Appleton. See also: October | November | December.
