S
M
T
W
T
F
S
30
76°
42°
31
82°
49°
1
84°
55°
2
73°
51°
3
66°
48°
4
68°
49°
5
71°
51°
6
76°
53°
7
77°
53°
8
79°
50°
9
80°
53°
10
80°
54°
11
79°
53°
12
78°
54°
13
79°
51°
14
78°
46°
15
83°
52°
16
82°
48°
17
70°
45°
18
70°
43°
19
73°
50°
20
70°
46°
21
68°
41°
22
68°
40°
23
70°
45°
24
67°
44°
25
68°
43°
26
74°
46°
27
76°
48°
28
73°
47°
29
65°
44°
30
71°
44°
1
75°
47°
2
67°
46°
3
63°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Keller
Keller's September 2026 forecast shows daily high temperatures ranging from 63° to 84°, with overnight lows between 40° and 55°. The average high for September is 73° with an average low of 48°. 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 Keller. See also: October | November | December.
