S
M
T
W
T
F
S
30
91°
65°
31
90°
65°
1
87°
64°
2
86°
65°
3
89°
65°
4
87°
64°
5
87°
63°
6
86°
64°
7
88°
61°
8
86°
62°
9
89°
59°
10
90°
60°
11
89°
62°
12
88°
61°
13
89°
61°
14
90°
51°
15
83°
51°
16
76°
52°
17
77°
55°
18
78°
52°
19
76°
55°
20
83°
54°
21
84°
56°
22
86°
57°
23
87°
55°
24
87°
55°
25
85°
57°
26
85°
56°
27
84°
47°
28
74°
47°
29
75°
48°
30
78°
46°
1
74°
48°
2
78°
52°
3
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Amarillo
Amarillo's September 2026 forecast shows daily high temperatures ranging from 74° to 91°, with overnight lows between 46° and 65°. The average high for September is 84° with an average low of 57°. 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 Amarillo. See also: October | November | December.
