S
M
T
W
T
F
S
26
75°
58°
27
84°
59°
28
85°
54°
29
83°
51°
30
80°
48°
31
76°
49°
1
77°
50°
2
76°
49°
3
78°
52°
4
80°
56°
5
84°
57°
6
84°
57°
7
86°
53°
8
82°
53°
9
82°
52°
10
84°
56°
11
78°
53°
12
83°
44°
13
74°
53°
14
78°
56°
15
84°
47°
16
82°
51°
17
79°
52°
18
81°
47°
19
82°
49°
20
76°
46°
21
77°
51°
22
79°
54°
23
81°
45°
24
73°
43°
25
71°
44°
26
70°
45°
27
69°
44°
28
69°
44°
29
70°
42°
30
70°
44°
31
71°
44°
1
68°
45°
2
68°
51°
3
72°
51°
4
73°
42°
5
73°
40°
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 68° to 86°, with overnight lows between 40° and 59°. The average high for August is 77° with an average low of 50°. 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.
