S
M
T
W
T
F
S
30
57°
42°
31
52°
39°
1
58°
33°
2
60°
37°
3
64°
43°
4
62°
53°
5
64°
47°
6
61°
50°
7
59°
50°
8
56°
48°
9
63°
42°
10
61°
43°
11
59°
43°
12
57°
42°
13
55°
42°
14
54°
41°
15
57°
41°
16
55°
40°
17
56°
39°
18
51°
42°
19
51°
41°
20
52°
40°
21
50°
35°
22
49°
32°
23
49°
31°
24
50°
32°
25
49°
34°
26
47°
40°
27
48°
39°
28
53°
38°
29
51°
36°
30
49°
37°
1
50°
38°
2
49°
36°
3
50°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Willow
Willow's September 2026 forecast shows daily high temperatures ranging from 47° to 64°, with overnight lows between 31° and 53°. The average high for September is 54° with an average low of 40°. 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 Willow. See also: October | November | December.
