S
M
T
W
T
F
S
30
86°
66°
31
88°
59°
1
82°
58°
2
83°
62°
3
88°
65°
4
91°
70°
5
93°
67°
6
86°
59°
7
77°
62°
8
77°
56°
9
76°
54°
10
76°
57°
11
74°
52°
12
76°
51°
13
75°
52°
14
73°
48°
15
78°
54°
16
76°
54°
17
77°
56°
18
75°
54°
19
73°
53°
20
77°
54°
21
78°
53°
22
76°
53°
23
76°
54°
24
77°
55°
25
77°
54°
26
76°
54°
27
77°
53°
28
76°
52°
29
75°
51°
30
76°
53°
1
75°
53°
2
75°
51°
3
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wahpeton
Wahpeton's September 2026 forecast shows daily high temperatures ranging from 73° to 93°, with overnight lows between 48° and 70°. The average high for September is 78° 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 Wahpeton. See also: October | November | December.
