S
M
T
W
T
F
S
26
96°
80°
27
95°
79°
28
95°
80°
29
94°
80°
30
95°
79°
31
95°
80°
1
96°
79°
2
94°
80°
3
98°
78°
4
98°
79°
5
96°
79°
6
97°
78°
7
98°
77°
8
97°
79°
9
98°
79°
10
98°
78°
11
97°
78°
12
98°
79°
13
97°
79°
14
97°
78°
15
96°
80°
16
97°
80°
17
97°
79°
18
96°
80°
19
97°
79°
20
97°
77°
21
96°
78°
22
96°
78°
23
97°
77°
24
97°
78°
25
95°
78°
26
96°
79°
27
97°
78°
28
96°
77°
29
96°
78°
30
95°
78°
31
93°
77°
1
93°
78°
2
94°
77°
3
94°
77°
4
93°
76°
5
95°
78°
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 93° to 98°, with overnight lows between 76° and 80°. The average high for August is 96° 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 Riverside. See also: September | October | November.
