S
M
T
W
T
F
S
26
88°
74°
27
90°
75°
28
88°
77°
29
81°
62°
30
70°
60°
1
63°
52°
2
76°
54°
3
80°
59°
4
82°
68°
5
86°
73°
6
87°
59°
7
71°
56°
8
80°
64°
9
80°
64°
10
84°
66°
11
80°
63°
12
84°
64°
13
85°
65°
14
87°
66°
15
84°
64°
16
79°
67°
17
77°
66°
18
80°
67°
19
81°
66°
20
83°
68°
21
87°
66°
22
81°
62°
23
81°
62°
24
82°
65°
25
85°
63°
26
82°
62°
27
82°
63°
28
83°
65°
29
81°
67°
30
83°
68°
31
84°
69°
1
85°
69°
2
86°
68°
3
86°
72°
4
87°
72°
5
87°
70°
6
86°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in McNeil
McNeil's May 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 54° and 73°. The average high for May is 83° with an average low of 65°. 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 McNeil. See also: June | July | August.