S
M
T
W
T
F
S
30
82°
67°
31
89°
68°
1
90°
67°
2
83°
65°
3
79°
66°
4
82°
68°
5
76°
58°
6
79°
56°
7
80°
53°
8
73°
57°
9
84°
59°
10
77°
53°
11
79°
52°
12
78°
52°
13
70°
43°
14
68°
57°
15
73°
53°
16
66°
58°
17
73°
55°
18
70°
57°
19
69°
54°
20
70°
51°
21
66°
50°
22
67°
52°
23
70°
50°
24
68°
54°
25
67°
47°
26
73°
54°
27
72°
53°
28
65°
52°
29
67°
52°
30
68°
51°
1
70°
51°
2
69°
50°
3
68°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in De Pere
De Pere's September 2026 forecast shows daily high temperatures ranging from 65° to 78°, with overnight lows between 43° and 58°. The average high for September is 69° with an average low of 52°. 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 De Pere. See also: October | November | December.
