S
M
T
W
T
F
S
30
91°
56°
31
90°
57°
1
91°
59°
2
91°
56°
3
89°
52°
4
87°
51°
5
83°
51°
6
82°
55°
7
86°
53°
8
76°
48°
9
77°
50°
10
76°
43°
11
74°
44°
12
74°
43°
13
75°
41°
14
72°
43°
15
73°
40°
16
71°
41°
17
72°
42°
18
74°
42°
19
75°
43°
20
73°
44°
21
77°
45°
22
75°
45°
23
79°
40°
24
Hist. Avg.
71°
44°
25
Hist. Avg.
71°
43°
26
Hist. Avg.
70°
43°
27
Hist. Avg.
70°
43°
28
Hist. Avg.
69°
42°
29
Hist. Avg.
69°
42°
30
Hist. Avg.
68°
42°
1
Hist. Avg.
68°
42°
2
Hist. Avg.
67°
41°
3
Hist. Avg.
67°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Appleton
Appleton's September 2026 forecast shows daily high temperatures ranging from 71° to 91°, with overnight lows between 40° and 59°. The average high for September is 79° with an average low of 47°. 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.
