S
M
T
W
T
F
S
26
81°
59°
27
70°
54°
28
64°
54°
29
82°
59°
30
73°
59°
1
64°
55°
2
70°
50°
3
70°
45°
4
77°
43°
5
79°
52°
6
81°
63°
7
72°
54°
8
70°
50°
9
68°
55°
10
81°
59°
11
79°
57°
12
70°
57°
13
79°
52°
14
73°
54°
15
75°
45°
16
82°
50°
17
88°
61°
18
88°
59°
19
88°
61°
20
88°
63°
21
86°
66°
22
86°
68°
23
72°
63°
24
73°
64°
25
81°
66°
26
N/A
27
81°
67°
28
85°
66°
29
78°
66°
30
79°
61°
31
76°
59°
1
69°
57°
2
75°
61°
3
74°
62°
4
74°
60°
5
80°
62°
6
79°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Allen
Allen's May 2026 forecast shows daily high temperatures ranging from 69° to 85°, with overnight lows between 57° and 67°. The average high for May is 77° with an average low of 62°. 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.
