S
M
T
W
T
F
S
30
72°
57°
31
72°
58°
1
73°
60°
2
76°
61°
3
77°
62°
4
78°
62°
5
78°
61°
6
79°
60°
7
76°
59°
8
73°
58°
9
73°
59°
10
75°
59°
11
76°
58°
12
77°
58°
13
78°
59°
14
77°
58°
15
77°
58°
16
75°
57°
17
73°
56°
18
74°
56°
19
74°
55°
20
73°
57°
21
75°
52°
22
75°
51°
23
74°
42°
24
70°
41°
25
72°
48°
26
71°
47°
27
69°
53°
28
72°
54°
29
75°
53°
30
72°
44°
1
71°
39°
2
63°
48°
3
65°
45°
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 63° to 79°, with overnight lows between 39° and 62°. The average high for September is 74° with an average low of 54°. 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.
