S
M
T
W
T
F
S
26
48°
21°
27
52°
22°
28
49°
25°
29
50°
23°
30
44°
20°
1
46°
21°
2
51°
28°
3
48°
25°
4
48°
23°
5
49°
24°
6
50°
24°
7
57°
25°
8
58°
29°
9
57°
29°
10
58°
27°
11
58°
28°
12
59°
26°
13
59°
28°
14
54°
29°
15
52°
27°
16
53°
27°
17
54°
28°
18
54°
29°
19
55°
31°
20
54°
31°
21
53°
29°
22
54°
29°
23
55°
30°
24
56°
30°
25
58°
33°
26
57°
33°
27
58°
35°
28
61°
34°
29
63°
37°
30
66°
36°
31
63°
34°
1
60°
34°
2
60°
35°
3
62°
36°
4
63°
41°
5
66°
44°
6
68°
39°
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 44° to 68°, with overnight lows between 20° 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.
