S
M
T
W
T
F
S
26
76°
58°
27
77°
56°
28
77°
56°
29
75°
54°
30
76°
55°
31
75°
55°
1
75°
55°
2
75°
54°
3
74°
55°
4
77°
58°
5
76°
59°
6
78°
59°
7
78°
58°
8
77°
58°
9
78°
57°
10
78°
56°
11
77°
52°
12
76°
51°
13
72°
52°
14
71°
53°
15
73°
52°
16
75°
51°
17
76°
54°
18
76°
57°
19
77°
54°
20
77°
54°
21
76°
53°
22
74°
50°
23
71°
49°
24
70°
48°
25
71°
49°
26
70°
50°
27
70°
51°
28
71°
52°
29
71°
54°
30
72°
55°
31
75°
55°
1
76°
56°
2
76°
55°
3
77°
55°
4
76°
54°
5
76°
54°
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 70° to 78°, with overnight lows between 48° and 59°. The average high for August is 75° with an average low of 54°. 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.
