S
M
T
W
T
F
S
26
52°
30°
27
54°
31°
28
54°
34°
29
48°
34°
30
46°
31°
1
51°
41°
2
51°
37°
3
53°
30°
4
59°
39°
5
53°
40°
6
42°
34°
7
48°
33°
8
47°
35°
9
57°
35°
10
61°
39°
11
56°
34°
12
58°
40°
13
60°
34°
14
56°
32°
15
54°
32°
16
58°
35°
17
59°
33°
18
57°
34°
19
59°
35°
20
57°
35°
21
59°
33°
22
54°
28°
23
54°
31°
24
55°
30°
25
55°
30°
26
56°
32°
27
55°
32°
28
57°
33°
29
56°
32°
30
56°
32°
31
57°
33°
1
56°
32°
2
55°
32°
3
58°
33°
4
59°
34°
5
63°
38°
6
59°
37°
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 47° to 63°, with overnight lows between 28° and 40°. The average high for May is 57° with an average low of 34°. 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.
