S
M
T
W
T
F
S
26
55°
32°
27
55°
36°
28
56°
27°
29
52°
27°
30
52°
25°
1
56°
28°
2
57°
32°
3
56°
31°
4
48°
27°
5
52°
29°
6
54°
27°
7
56°
30°
8
55°
27°
9
54°
25°
10
50°
27°
11
50°
26°
12
52°
26°
13
52°
27°
14
54°
29°
15
52°
27°
16
52°
27°
17
53°
28°
18
53°
27°
19
56°
28°
20
56°
29°
21
58°
30°
22
61°
31°
23
53°
30°
24
55°
31°
25
55°
31°
26
56°
32°
27
56°
31°
28
57°
32°
29
55°
32°
30
55°
33°
31
56°
32°
1
57°
33°
2
58°
33°
3
58°
34°
4
59°
34°
5
62°
38°
6
62°
38°
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 48° to 62°, with overnight lows between 25° and 38°. The average high for May is 55° 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.
