S
M
T
W
T
F
S
26
96°
68°
27
92°
67°
28
95°
66°
29
89°
63°
30
87°
61°
31
86°
60°
1
88°
61°
2
93°
65°
3
95°
62°
4
97°
69°
5
96°
65°
6
97°
64°
7
97°
67°
8
96°
66°
9
92°
61°
10
92°
59°
11
89°
59°
12
88°
60°
13
88°
59°
14
89°
58°
15
88°
58°
16
87°
59°
17
87°
59°
18
86°
60°
19
86°
59°
20
87°
60°
21
86°
59°
22
85°
58°
23
84°
56°
24
83°
55°
25
85°
54°
26
84°
56°
27
83°
54°
28
87°
55°
29
87°
60°
30
89°
60°
31
88°
61°
1
87°
54°
2
79°
54°
3
79°
55°
4
80°
54°
5
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Richland
Richland's August 2026 forecast shows daily high temperatures ranging from 79° to 97°, with overnight lows between 54° and 69°. The average high for August is 88° with an average low of 60°. 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 Richland. See also: September | October | November.