S
M
T
W
T
F
S
26
63°
45°
27
67°
46°
28
68°
42°
29
66°
45°
30
67°
45°
1
68°
47°
2
67°
44°
3
69°
48°
4
70°
49°
5
71°
50°
6
71°
51°
7
70°
52°
8
72°
50°
9
72°
49°
10
66°
50°
11
63°
51°
12
70°
52°
13
72°
51°
14
70°
51°
15
72°
53°
16
74°
54°
17
76°
54°
18
75°
47°
19
74°
46°
20
67°
45°
21
68°
49°
22
67°
48°
23
65°
49°
24
66°
49°
25
70°
57°
26
77°
56°
27
77°
57°
28
70°
58°
29
79°
55°
30
81°
50°
31
71°
55°
1
77°
53°
2
80°
59°
3
83°
60°
4
81°
51°
5
79°
50°
6
71°
51°
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 63° to 83°, with overnight lows between 42° and 60°. The average high for May is 71° with an average low of 51°. 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.