S
M
T
W
T
F
S
26
54°
30°
27
51°
27°
28
49°
23°
29
50°
24°
30
52°
25°
1
54°
28°
2
57°
29°
3
55°
29°
4
53°
28°
5
54°
26°
6
49°
23°
7
56°
31°
8
57°
27°
9
55°
26°
10
58°
32°
11
50°
29°
12
52°
26°
13
52°
26°
14
53°
28°
15
53°
30°
16
54°
28°
17
54°
28°
18
59°
30°
19
61°
30°
20
62°
33°
21
63°
34°
22
63°
30°
23
55°
31°
24
55°
31°
25
56°
32°
26
55°
29°
27
53°
29°
28
54°
30°
29
55°
32°
30
56°
32°
31
56°
31°
1
54°
31°
2
55°
32°
3
57°
32°
4
58°
33°
5
70°
43°
6
71°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Richardson
Richardson's May 2026 forecast shows daily high temperatures ranging from 49° to 71°, with overnight lows between 23° and 44°. The average high for May is 56° with an average low of 30°. 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 Richardson. See also: June | July | August.
