S
M
T
W
T
F
S
26
85°
65°
27
86°
73°
28
83°
70°
29
71°
63°
30
68°
58°
1
68°
55°
2
N/A
3
81°
58°
4
83°
64°
5
84°
61°
6
64°
56°
7
71°
52°
8
80°
58°
9
84°
65°
10
79°
62°
11
78°
58°
12
80°
59°
13
85°
61°
14
87°
62°
15
82°
64°
16
81°
61°
17
78°
64°
18
78°
65°
19
81°
66°
20
82°
66°
21
84°
60°
22
78°
59°
23
78°
60°
24
79°
60°
25
77°
61°
26
78°
59°
27
79°
60°
28
79°
61°
29
81°
65°
30
83°
67°
31
81°
68°
1
82°
68°
2
83°
66°
3
82°
69°
4
83°
69°
5
82°
70°
6
83°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Richardson
Richardson's May 2026 forecast shows daily high temperatures ranging from 64° to 87°, with overnight lows between 52° and 70°. The average high for May is 80° with an average low of 63°. 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.
