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
80°
64°
12
81°
54°
13
65°
51°
14
67°
63°
15
72°
55°
16
69°
56°
17
70°
54°
18
69°
54°
19
68°
50°
20
68°
52°
21
71°
54°
22
72°
56°
23
74°
52°
24
67°
41°
25
69°
54°
26
73°
55°
27
72°
54°
28
72°
53°
29
69°
53°
30
70°
50°
1
65°
49°
2
61°
50°
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 61° to 81°, with overnight lows between 41° and 64°. The average high for September is 70° with an average low of 53°. 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.
