S
M
T
W
T
F
S
31
75°
54°
1
81°
59°
2
72°
61°
3
63°
43°
4
61°
37°
5
59°
43°
6
63°
39°
7
64°
37°
8
79°
50°
9
72°
59°
10
75°
57°
11
79°
55°
12
77°
63°
13
82°
64°
14
88°
66°
15
86°
66°
16
86°
63°
17
72°
61°
18
77°
63°
19
70°
63°
20
70°
59°
21
77°
59°
22
75°
57°
23
79°
54°
24
77°
55°
25
82°
50°
26
84°
55°
27
73°
50°
28
82°
46°
29
90°
54°
30
79°
59°
1
84°
63°
2
86°
61°
3
90°
55°
4
90°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Willmar
Willmar's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Willmar. See also: October | November | December.
