S
M
T
W
T
F
S
26
63°
50°
27
71°
49°
28
62°
52°
29
71°
55°
30
71°
53°
1
67°
48°
2
62°
42°
3
65°
39°
4
76°
39°
5
77°
52°
6
72°
62°
7
64°
49°
8
69°
43°
9
72°
51°
10
82°
57°
11
65°
46°
12
71°
42°
13
77°
47°
14
64°
46°
15
73°
44°
16
84°
49°
17
89°
63°
18
90°
64°
19
92°
67°
20
90°
60°
21
88°
62°
22
62°
56°
23
57°
54°
24
74°
54°
25
82°
66°
26
82°
67°
27
83°
68°
28
89°
60°
29
83°
64°
30
83°
58°
31
73°
59°
1
81°
57°
2
78°
51°
3
80°
52°
4
80°
59°
5
82°
61°
6
84°
63°
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 73° to 89°, with overnight lows between 51° and 64°. The average high for May is 81° 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.
