S
M
T
W
T
F
S
26
69°
43°
27
59°
50°
28
61°
47°
29
64°
49°
30
68°
51°
31
73°
46°
1
76°
50°
2
74°
52°
3
71°
61°
4
76°
56°
5
75°
52°
6
76°
54°
7
70°
54°
8
62°
52°
9
69°
47°
10
72°
54°
11
72°
51°
12
75°
49°
13
79°
50°
14
75°
59°
15
69°
59°
16
72°
56°
17
66°
54°
18
62°
48°
19
69°
48°
20
68°
52°
21
62°
51°
22
69°
48°
23
59°
45°
24
68°
39°
25
64°
46°
26
53°
43°
27
53°
41°
28
63°
49°
29
52°
43°
30
53°
43°
31
42°
38°
1
49°
40°
2
48°
32°
3
50°
28°
4
62°
44°
5
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Richardson
Richardson's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Richardson. See also: September | October | November.