S
M
T
W
T
F
S
30
80°
63°
31
90°
65°
1
91°
69°
2
85°
66°
3
83°
66°
4
83°
65°
5
82°
64°
6
83°
62°
7
76°
59°
8
72°
58°
9
78°
59°
10
76°
57°
11
70°
52°
12
71°
52°
13
70°
55°
14
77°
54°
15
76°
56°
16
76°
55°
17
75°
55°
18
74°
54°
19
75°
55°
20
75°
54°
21
74°
55°
22
76°
55°
23
76°
54°
24
75°
54°
25
74°
53°
26
75°
53°
27
74°
52°
28
74°
52°
29
73°
51°
30
72°
51°
1
72°
50°
2
71°
50°
3
72°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Waupaca
Waupaca's September 2026 forecast shows daily high temperatures ranging from 70° to 91°, with overnight lows between 49° and 69°. The average high for September is 76° with an average low of 56°. 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 Waupaca. See also: October | November | December.
