S
M
T
W
T
F
S
26
96°
77°
27
97°
77°
28
97°
77°
29
100°
77°
30
97°
77°
31
100°
77°
1
98°
76°
2
96°
76°
3
93°
74°
4
91°
75°
5
92°
75°
6
95°
73°
7
97°
72°
8
97°
74°
9
96°
75°
10
96°
75°
11
95°
75°
12
96°
74°
13
96°
75°
14
95°
75°
15
96°
74°
16
96°
75°
17
97°
74°
18
97°
75°
19
96°
75°
20
97°
74°
21
96°
74°
22
95°
73°
23
96°
74°
24
96°
74°
25
95°
73°
26
97°
74°
27
97°
74°
28
96°
73°
29
91°
73°
30
89°
72°
31
91°
73°
1
94°
73°
2
94°
72°
3
93°
73°
4
94°
73°
5
94°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Riverside
Riverside's August 2026 forecast shows daily high temperatures ranging from 89° to 100°, with overnight lows between 72° and 77°. The average high for August is 95° with an average low of 74°. 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 Riverside. See also: September | October | November.
