S
M
T
W
T
F
S
30
95°
69°
31
95°
72°
1
94°
72°
2
94°
71°
3
93°
72°
4
94°
68°
5
93°
69°
6
94°
70°
7
93°
71°
8
90°
70°
9
92°
71°
10
92°
70°
11
91°
70°
12
92°
69°
13
91°
69°
14
92°
68°
15
89°
69°
16
87°
69°
17
88°
68°
18
87°
68°
19
88°
62°
20
85°
62°
21
85°
66°
22
87°
67°
23
90°
67°
24
86°
68°
25
88°
67°
26
89°
66°
27
88°
66°
28
89°
64°
29
87°
65°
30
Hist. Avg.
87°
66°
1
Hist. Avg.
87°
66°
2
Hist. Avg.
86°
65°
3
Hist. Avg.
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Willis
Willis's September 2026 forecast shows daily high temperatures ranging from 85° to 95°, with overnight lows between 62° and 72°. The average high for September is 90° with an average low of 68°. 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 Willis. See also: October | November | December.
