S
M
T
W
T
F
S
26
85°
62°
27
90°
64°
28
84°
55°
29
68°
51°
30
68°
51°
1
71°
48°
2
76°
44°
3
83°
52°
4
82°
63°
5
79°
49°
6
64°
48°
7
77°
43°
8
83°
51°
9
88°
57°
10
75°
56°
11
80°
51°
12
83°
55°
13
89°
58°
14
88°
62°
15
90°
71°
16
88°
71°
17
89°
72°
18
89°
75°
19
80°
56°
20
77°
56°
21
71°
61°
22
85°
63°
23
80°
63°
24
86°
60°
25
89°
61°
26
86°
65°
27
79°
66°
28
82°
65°
29
84°
68°
30
85°
69°
31
83°
63°
1
81°
60°
2
83°
60°
3
80°
61°
4
79°
59°
5
85°
62°
6
87°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Allen
Allen's May 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 59° and 69°. The average high for May is 83° 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 Allen. See also: June | July | August.
