S
M
T
W
T
F
S
26
48°
38°
27
53°
31°
28
66°
29°
29
70°
33°
30
73°
40°
1
76°
41°
2
80°
46°
3
69°
46°
4
50°
38°
5
48°
38°
6
67°
33°
7
78°
42°
8
81°
45°
9
83°
44°
10
90°
47°
11
87°
48°
12
87°
55°
13
81°
44°
14
75°
44°
15
76°
46°
16
67°
42°
17
60°
40°
18
66°
51°
19
69°
41°
20
73°
39°
21
73°
69°
22
78°
47°
23
79°
45°
24
80°
51°
25
77°
47°
26
72°
45°
27
65°
44°
28
65°
49°
29
79°
56°
30
81°
56°
31
86°
58°
1
90°
59°
2
87°
58°
3
86°
59°
4
86°
60°
5
84°
58°
6
85°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Riverside
Lake Riverside's May 2026 forecast shows daily high temperatures ranging from 65° to 90°, with overnight lows between 44° and 60°. The average high for May is 80° 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 May weather will actually feel in Lake Riverside. See also: June | July | August.
