S
M
T
W
T
F
S
26
94°
74°
27
96°
76°
28
95°
75°
29
96°
76°
30
97°
77°
31
97°
76°
1
93°
78°
2
95°
73°
3
98°
73°
4
98°
77°
5
96°
78°
6
99°
77°
7
99°
76°
8
97°
74°
9
96°
76°
10
93°
74°
11
98°
74°
12
99°
77°
13
98°
79°
14
97°
79°
15
100°
78°
16
100°
74°
17
102°
74°
18
100°
77°
19
100°
79°
20
102°
76°
21
103°
79°
22
104°
79°
23
102°
80°
24
103°
76°
25
102°
78°
26
102°
77°
27
102°
77°
28
98°
74°
29
99°
72°
30
99°
76°
31
99°
76°
1
94°
76°
2
90°
76°
3
83°
75°
4
94°
77°
5
95°
75°
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 ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
