S
M
T
W
T
F
S
26
87°
72°
27
85°
70°
28
84°
75°
29
84°
71°
30
87°
73°
1
87°
71°
2
95°
75°
3
81°
71°
4
80°
72°
5
84°
73°
6
88°
77°
7
89°
74°
8
90°
74°
9
91°
76°
10
90°
80°
11
90°
80°
12
90°
74°
13
90°
76°
14
93°
75°
15
90°
72°
16
87°
75°
17
86°
79°
18
87°
79°
19
87°
79°
20
87°
78°
21
87°
80°
22
88°
81°
23
88°
81°
24
88°
78°
25
88°
75°
26
89°
79°
27
89°
80°
28
88°
77°
29
88°
77°
30
90°
76°
31
88°
75°
1
87°
77°
2
84°
78°
3
86°
77°
4
89°
78°
5
88°
77°
6
87°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riverland
Riverland's May 2026 forecast shows daily high temperatures ranging from 84° to 90°, with overnight lows between 75° and 80°. The average high for May is 88° with an average low of 77°. 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 Riverland. See also: June | July | August.