S
M
T
W
T
F
S
30
85°
59°
31
82°
56°
1
78°
57°
2
82°
58°
3
83°
59°
4
82°
60°
5
79°
61°
6
77°
60°
7
82°
59°
8
80°
58°
9
82°
60°
10
84°
61°
11
84°
58°
12
80°
57°
13
80°
57°
14
81°
58°
15
82°
58°
16
81°
57°
17
77°
55°
18
69°
49°
19
75°
55°
20
79°
54°
21
74°
55°
22
79°
53°
23
70°
47°
24
66°
47°
25
66°
44°
26
67°
49°
27
74°
53°
28
75°
53°
29
73°
52°
30
74°
50°
1
68°
45°
2
68°
51°
3
74°
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 66° to 85°, with overnight lows between 44° and 61°. The average high for September is 77° with an average low of 55°. 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.
