S
M
T
W
T
F
S
30
76°
67°
31
86°
72°
1
88°
74°
2
93°
74°
3
92°
68°
4
77°
67°
5
78°
62°
6
76°
56°
7
77°
57°
8
83°
59°
9
88°
70°
10
82°
67°
11
76°
61°
12
74°
62°
13
83°
63°
14
67°
57°
15
82°
57°
16
81°
71°
17
77°
70°
18
73°
65°
19
70°
62°
20
70°
64°
21
65°
59°
22
65°
56°
23
68°
57°
24
69°
51°
25
67°
43°
26
69°
45°
27
71°
46°
28
70°
50°
29
74°
49°
30
74°
57°
1
84°
69°
2
76°
57°
3
65°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Windfall
Windfall's September 2026 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 Windfall. See also: October | November | December.