S
M
T
W
T
F
S
26
72°
54°
27
75°
60°
28
72°
61°
29
73°
62°
30
77°
63°
1
81°
63°
2
82°
62°
3
82°
62°
4
79°
55°
5
72°
54°
6
73°
55°
7
74°
57°
8
76°
60°
9
81°
62°
10
80°
61°
11
79°
65°
12
81°
64°
13
84°
66°
14
78°
66°
15
81°
63°
16
76°
66°
17
78°
67°
18
78°
67°
19
79°
66°
20
79°
64°
21
80°
61°
22
79°
61°
23
79°
62°
24
80°
62°
25
85°
63°
26
86°
64°
27
86°
67°
28
88°
66°
29
89°
69°
30
90°
66°
31
92°
72°
1
92°
71°
2
91°
67°
3
87°
65°
4
84°
66°
5
83°
72°
6
91°
73°
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 72° to 92°, with overnight lows between 54° and 73°. The average high for May is 81° 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 Lewisville. See also: June | July | August.
