S
M
T
W
T
F
S
26
55°
47°
27
66°
44°
28
60°
48°
29
61°
53°
30
68°
49°
1
62°
45°
2
60°
51°
3
62°
43°
4
72°
50°
5
83°
59°
6
71°
62°
7
62°
52°
8
71°
49°
9
71°
57°
10
75°
55°
11
64°
50°
12
66°
54°
13
72°
53°
14
64°
51°
15
70°
54°
16
80°
64°
17
87°
66°
18
88°
68°
19
90°
69°
20
82°
63°
21
78°
61°
22
79°
62°
23
82°
62°
24
80°
63°
25
81°
59°
26
82°
64°
27
83°
65°
28
83°
65°
29
82°
64°
30
83°
66°
31
84°
65°
1
83°
63°
2
76°
60°
3
76°
62°
4
80°
66°
5
77°
67°
6
83°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riva
Riva's May 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 51° and 69°. The average high for May is 80° with an average low of 62°. 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 Riva. See also: June | July | August.
