S
M
T
W
T
F
S
30
82°
68°
31
91°
70°
1
91°
73°
2
84°
66°
3
81°
72°
4
84°
70°
5
79°
64°
6
81°
63°
7
81°
61°
8
73°
66°
9
84°
61°
10
81°
59°
11
81°
59°
12
81°
59°
13
70°
52°
14
70°
48°
15
77°
59°
16
73°
55°
17
70°
57°
18
66°
57°
19
63°
59°
20
64°
50°
21
63°
50°
22
64°
48°
23
68°
46°
24
72°
58°
25
72°
49°
26
72°
50°
27
68°
54°
28
72°
57°
29
72°
57°
30
69°
57°
1
69°
54°
2
68°
54°
3
68°
50°
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 68° to 72°, with overnight lows between 49° and 58°. The average high for September is 70° 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.
