S
M
T
W
T
F
S
26
101°
81°
27
100°
82°
28
100°
82°
29
98°
82°
30
100°
82°
31
101°
83°
1
99°
83°
2
97°
76°
3
101°
79°
4
99°
81°
5
100°
82°
6
100°
82°
7
100°
82°
8
100°
82°
9
99°
79°
10
98°
79°
11
99°
79°
12
103°
81°
13
102°
80°
14
100°
82°
15
101°
81°
16
103°
83°
17
104°
80°
18
103°
81°
19
102°
80°
20
101°
79°
21
101°
79°
22
103°
82°
23
101°
80°
24
100°
79°
25
93°
73°
26
97°
78°
27
97°
78°
28
95°
76°
29
94°
75°
30
95°
76°
31
95°
77°
1
94°
76°
2
95°
76°
3
95°
75°
4
94°
76°
5
95°
76°
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 93° to 104°, with overnight lows between 73° and 83°. The average high for August is 99° with an average low of 78°. 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.
