S
M
T
W
T
F
S
30
70°
51°
31
73°
48°
1
81°
49°
2
84°
50°
3
77°
46°
4
88°
57°
5
75°
52°
6
75°
50°
7
68°
52°
8
64°
46°
9
78°
55°
10
89°
51°
11
60°
44°
12
55°
44°
13
53°
43°
14
65°
41°
15
70°
45°
16
63°
39°
17
65°
46°
18
71°
48°
19
74°
52°
20
75°
53°
21
76°
49°
22
72°
41°
23
64°
46°
24
70°
47°
25
62°
42°
26
67°
45°
27
75°
46°
28
65°
41°
29
68°
43°
30
61°
37°
1
68°
45°
2
67°
44°
3
72°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Winnett
Winnett's September 2026 forecast shows daily high temperatures ranging from 53° to 89°, with overnight lows between 37° and 55°. The average high for September is 68° with an average low of 45°. 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 Winnett. See also: October | November | December.