S
M
T
W
T
F
S
26
62°
45°
27
67°
45°
28
60°
43°
29
54°
43°
30
54°
38°
1
48°
34°
2
49°
27°
3
61°
34°
4
74°
44°
5
57°
46°
6
55°
39°
7
56°
37°
8
63°
35°
9
68°
48°
10
61°
39°
11
60°
37°
12
62°
31°
13
59°
40°
14
64°
43°
15
69°
36°
16
79°
53°
17
83°
60°
18
83°
65°
19
83°
64°
20
66°
48°
21
63°
40°
22
67°
46°
23
57°
50°
24
69°
49°
25
79°
56°
26
82°
59°
27
81°
58°
28
81°
51°
29
74°
52°
30
73°
52°
31
74°
51°
1
74°
54°
2
72°
53°
3
73°
56°
4
76°
57°
5
75°
54°
6
73°
58°
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 57° to 82°, with overnight lows between 49° and 59°. The average high for May is 74° with an average low of 54°. 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.
