S
M
T
W
T
F
S
30
92°
69°
31
90°
63°
1
85°
62°
2
90°
63°
3
88°
73°
4
92°
69°
5
89°
70°
6
83°
69°
7
85°
71°
8
88°
58°
9
83°
58°
10
75°
56°
11
78°
61°
12
86°
64°
13
78°
58°
14
80°
59°
15
82°
59°
16
81°
57°
17
75°
52°
18
79°
57°
19
78°
56°
20
79°
57°
21
71°
56°
22
76°
55°
23
78°
57°
24
79°
56°
25
77°
52°
26
66°
45°
27
65°
45°
28
63°
43°
29
74°
46°
30
63°
44°
1
67°
51°
2
62°
47°
3
63°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Windom
Windom's September 2026 forecast shows daily high temperatures ranging from 62° to 92°, with overnight lows between 43° and 71°. The average high for September is 77° 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 Windom. See also: October | November | December.