S
M
T
W
T
F
S
26
69°
48°
27
80°
44°
28
77°
53°
29
67°
49°
30
56°
39°
1
59°
34°
2
54°
33°
3
61°
30°
4
72°
47°
5
76°
59°
6
61°
50°
7
63°
40°
8
71°
36°
9
70°
52°
10
70°
52°
11
69°
46°
12
73°
42°
13
72°
49°
14
60°
41°
15
70°
35°
16
73°
47°
17
86°
62°
18
90°
65°
19
88°
66°
20
75°
46°
21
69°
55°
22
67°
62°
23
71°
62°
24
73°
58°
25
76°
62°
26
77°
61°
27
77°
57°
28
75°
56°
29
76°
54°
30
77°
55°
31
79°
53°
1
74°
57°
2
75°
58°
3
75°
58°
4
71°
56°
5
70°
54°
6
72°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lewisville
Lewisville's May 2026 forecast shows daily high temperatures ranging from 67° to 90°, with overnight lows between 46° and 66°. The average high for May is 75° with an average low of 58°. 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 Lewisville. See also: June | July | August.
