S
M
T
W
T
F
S
26
86°
58°
27
87°
63°
28
77°
65°
29
81°
61°
30
70°
56°
1
70°
49°
2
72°
51°
3
72°
42°
4
82°
51°
5
78°
59°
6
74°
58°
7
72°
53°
8
75°
48°
9
81°
54°
10
85°
56°
11
78°
56°
12
81°
51°
13
84°
56°
14
74°
50°
15
82°
47°
16
83°
58°
17
90°
59°
18
91°
71°
19
90°
68°
20
81°
69°
21
81°
69°
22
80°
69°
23
84°
67°
24
84°
69°
25
85°
70°
26
84°
68°
27
84°
69°
28
85°
67°
29
85°
66°
30
84°
65°
31
86°
63°
1
88°
68°
2
88°
68°
3
85°
67°
4
82°
64°
5
83°
64°
6
88°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Killen
Killen's May 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 63° and 71°. The average high for May is 85° 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 May weather will actually feel in Killen. See also: June | July | August.