S
M
T
W
T
F
S
26
66°
41°
27
70°
51°
28
63°
49°
29
59°
35°
30
59°
33°
1
53°
34°
2
57°
41°
3
65°
43°
4
73°
49°
5
57°
38°
6
54°
38°
7
55°
37°
8
66°
45°
9
65°
44°
10
64°
47°
11
64°
47°
12
67°
46°
13
65°
47°
14
70°
48°
15
64°
47°
16
65°
45°
17
65°
54°
18
72°
54°
19
67°
53°
20
71°
55°
21
73°
55°
22
69°
54°
23
73°
50°
24
67°
48°
25
67°
50°
26
69°
57°
27
72°
54°
28
69°
53°
29
69°
49°
30
73°
50°
31
70°
49°
1
70°
56°
2
79°
54°
3
70°
52°
4
71°
51°
5
71°
51°
6
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plano
Plano's May 2026 forecast shows daily high temperatures ranging from 53° to 79°, with overnight lows between 34° and 57°. The average high for May is 67° with an average low of 49°. 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 Plano. See also: June | July | August.
