S
M
T
W
T
F
S
26
66°
28°
27
69°
33°
28
69°
36°
29
75°
41°
30
77°
43°
1
79°
39°
2
83°
48°
3
84°
55°
4
85°
51°
5
80°
47°
6
85°
49°
7
82°
50°
8
77°
43°
9
78°
49°
10
83°
48°
11
81°
50°
12
86°
52°
13
83°
51°
14
83°
51°
15
80°
47°
16
71°
43°
17
71°
46°
18
65°
40°
19
65°
39°
20
66°
40°
21
73°
48°
22
76°
50°
23
73°
46°
24
77°
50°
25
78°
50°
26
77°
49°
27
75°
50°
28
77°
51°
29
77°
50°
30
79°
51°
31
80°
52°
1
81°
52°
2
80°
51°
3
81°
52°
4
80°
52°
5
79°
51°
6
79°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Keller
Keller's May 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 39° and 55°. The average high for May is 78° with an average low of 49°. 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 Keller. See also: June | July | August.
