S
M
T
W
T
F
S
30
95°
70°
31
96°
73°
1
96°
72°
2
95°
70°
3
92°
69°
4
90°
70°
5
91°
71°
6
93°
71°
7
95°
70°
8
95°
71°
9
94°
71°
10
94°
70°
11
93°
71°
12
94°
71°
13
94°
70°
14
90°
66°
15
87°
67°
16
89°
67°
17
91°
69°
18
86°
68°
19
85°
67°
20
90°
68°
21
91°
69°
22
89°
68°
23
88°
61°
24
91°
62°
25
83°
62°
26
85°
60°
27
85°
59°
28
Hist. Avg.
86°
63°
29
Hist. Avg.
86°
63°
30
Hist. Avg.
85°
62°
1
Hist. Avg.
85°
62°
2
Hist. Avg.
84°
62°
3
Hist. Avg.
84°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Killeen
Killeen's September 2026 forecast shows daily high temperatures ranging from 83° to 96°, with overnight lows between 59° and 73°. The average high for September is 91° 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 Killeen. See also: October | November | December.
