S
M
T
W
T
F
S
26
70°
49°
27
69°
50°
28
74°
51°
29
77°
56°
30
69°
53°
1
75°
49°
2
73°
48°
3
72°
51°
4
78°
58°
5
80°
59°
6
80°
60°
7
79°
60°
8
79°
59°
9
78°
59°
10
71°
55°
11
75°
52°
12
71°
51°
13
70°
52°
14
75°
60°
15
77°
56°
16
78°
61°
17
81°
61°
18
76°
55°
19
73°
54°
20
74°
59°
21
76°
63°
22
81°
64°
23
80°
64°
24
80°
63°
25
82°
65°
26
84°
65°
27
81°
62°
28
76°
57°
29
85°
63°
30
85°
63°
31
85°
65°
1
86°
61°
2
87°
59°
3
85°
60°
4
85°
60°
5
87°
66°
6
88°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Allison
Allison's May 2026 forecast shows daily high temperatures ranging from 69° to 88°, with overnight lows between 48° and 66°. The average high for May is 78° 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 Allison. See also: June | July | August.