S
M
T
W
T
F
S
30
98°
75°
31
99°
76°
1
98°
76°
2
101°
77°
3
93°
78°
4
95°
78°
5
98°
75°
6
97°
76°
7
99°
76°
8
99°
79°
9
98°
78°
10
98°
76°
11
99°
74°
12
100°
78°
13
99°
77°
14
99°
76°
15
98°
74°
16
99°
74°
17
97°
73°
18
98°
71°
19
96°
72°
20
93°
69°
21
89°
67°
22
90°
65°
23
92°
67°
24
90°
66°
25
90°
63°
26
90°
68°
27
86°
69°
28
85°
69°
29
88°
69°
30
88°
68°
1
87°
68°
2
88°
67°
3
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harker Heights
Harker Heights's September 2026 forecast shows daily high temperatures ranging from 85° to 100°, with overnight lows between 63° and 78°. The average high for September is 92° with an average low of 70°. 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 Harker Heights. See also: October | November | December.
