S
M
T
W
T
F
S
26
83°
59°
27
84°
57°
28
73°
62°
29
83°
64°
30
71°
56°
1
65°
53°
2
70°
46°
3
72°
40°
4
80°
43°
5
80°
49°
6
80°
67°
7
73°
56°
8
71°
52°
9
74°
56°
10
82°
59°
11
82°
58°
12
79°
58°
13
82°
54°
14
79°
49°
15
83°
43°
16
87°
53°
17
90°
59°
18
91°
65°
19
91°
67°
20
92°
65°
21
88°
69°
22
83°
68°
23
86°
66°
24
81°
68°
25
N/A
26
78°
70°
27
83°
68°
28
82°
70°
29
78°
67°
30
76°
65°
31
78°
62°
1
79°
59°
2
80°
60°
3
82°
61°
4
83°
63°
5
83°
64°
6
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Riverside
Riverside's May 2026 forecast shows daily high temperatures ranging from 76° to 85°, with overnight lows between 59° and 70°. The average high for May is 81° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Riverside. See also: June | July | August.
