S
M
T
W
T
F
S
26
86°
72°
27
86°
76°
28
89°
75°
29
85°
65°
30
73°
64°
1
64°
52°
2
74°
49°
3
78°
50°
4
81°
56°
5
85°
68°
6
82°
63°
7
73°
59°
8
79°
62°
9
89°
71°
10
89°
65°
11
78°
64°
12
82°
63°
13
86°
61°
14
88°
64°
15
87°
67°
16
87°
69°
17
87°
76°
18
89°
77°
19
89°
65°
20
80°
71°
21
76°
70°
22
84°
71°
23
76°
70°
24
78°
67°
25
81°
69°
26
85°
73°
27
84°
69°
28
82°
72°
29
84°
72°
30
87°
71°
31
86°
70°
1
88°
70°
2
89°
69°
3
85°
71°
4
88°
72°
5
87°
72°
6
86°
71°
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 76° to 89°, with overnight lows between 67° and 73°. The average high for May is 84° with an average low of 71°. 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.
