S
M
T
W
T
F
S
26
65°
42°
27
69°
48°
28
61°
48°
29
57°
38°
30
56°
35°
1
49°
33°
2
56°
30°
3
68°
41°
4
79°
43°
5
55°
44°
6
58°
33°
7
58°
38°
8
62°
45°
9
73°
49°
10
61°
38°
11
58°
40°
12
60°
43°
13
68°
48°
14
73°
50°
15
72°
48°
16
65°
47°
17
66°
49°
18
70°
48°
19
72°
49°
20
65°
44°
21
64°
45°
22
64°
45°
23
65°
48°
24
66°
48°
25
67°
49°
26
67°
47°
27
70°
47°
28
71°
49°
29
73°
53°
30
77°
55°
31
78°
57°
1
77°
54°
2
72°
56°
3
79°
59°
4
80°
60°
5
80°
59°
6
72°
58°
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 58° to 80°, with overnight lows between 33° and 60°. The average high for May is 69° with an average low of 49°. 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.
