S
M
T
W
T
F
S
26
81°
61°
27
79°
62°
28
80°
62°
29
82°
61°
30
81°
63°
1
81°
63°
2
78°
61°
3
75°
56°
4
75°
62°
5
81°
64°
6
79°
64°
7
82°
65°
8
83°
65°
9
84°
64°
10
83°
65°
11
84°
65°
12
85°
66°
13
82°
66°
14
84°
65°
15
79°
67°
16
85°
67°
17
83°
66°
18
82°
60°
19
80°
61°
20
83°
68°
21
87°
67°
22
89°
66°
23
89°
62°
24
84°
60°
25
83°
66°
26
84°
67°
27
85°
64°
28
85°
67°
29
86°
66°
30
85°
65°
31
85°
63°
1
84°
63°
2
86°
65°
3
92°
65°
4
90°
67°
5
88°
71°
6
90°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harker Heights
Harker Heights's May 2026 forecast shows daily high temperatures ranging from 75° to 92°, with overnight lows between 56° and 71°. The average high for May is 83° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Harker Heights. See also: June | July | August.