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
54°
38°
5
52°
34°
6
41°
30°
7
47°
29°
8
49°
31°
9
52°
29°
10
53°
31°
11
54°
33°
12
55°
29°
13
57°
31°
14
57°
32°
15
58°
32°
16
55°
31°
17
59°
32°
18
53°
30°
19
54°
29°
20
54°
29°
21
55°
30°
22
56°
30°
23
55°
29°
24
57°
31°
25
56°
31°
26
56°
33°
27
57°
34°
28
58°
32°
29
58°
33°
30
59°
34°
31
57°
33°
1
58°
33°
2
59°
36°
3
58°
35°
4
58°
34°
5
59°
35°
6
61°
35°
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 41° to 61°, with overnight lows between 29° and 38°. The average high for May is 55° with an average low of 32°. 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.
