S
M
T
W
T
F
S
26
98°
75°
27
99°
75°
28
99°
75°
29
98°
75°
30
100°
78°
31
102°
76°
1
97°
72°
2
98°
74°
3
102°
77°
4
102°
76°
5
102°
77°
6
99°
77°
7
101°
76°
8
99°
75°
9
100°
77°
10
99°
76°
11
100°
75°
12
99°
75°
13
100°
76°
14
101°
75°
15
100°
76°
16
99°
76°
17
99°
76°
18
96°
76°
19
98°
75°
20
98°
76°
21
99°
76°
22
98°
75°
23
98°
76°
24
97°
76°
25
98°
75°
26
98°
76°
27
97°
76°
28
98°
75°
29
97°
75°
30
98°
76°
31
97°
75°
1
96°
74°
2
94°
74°
3
96°
75°
4
96°
75°
5
95°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Killeen
Killeen's August 2026 forecast shows daily high temperatures ranging from 94° to 102°, with overnight lows between 72° and 77°. The average high for August is 98° with an average low of 75°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Killeen. See also: September | October | November.