S
M
T
W
T
F
S
26
54°
40°
27
48°
36°
28
56°
35°
29
61°
37°
30
64°
38°
1
66°
41°
2
72°
44°
3
76°
48°
4
75°
49°
5
62°
51°
6
63°
43°
7
74°
46°
8
76°
49°
9
73°
52°
10
77°
48°
11
87°
52°
12
90°
59°
13
87°
59°
14
71°
48°
15
76°
46°
16
68°
47°
17
54°
44°
18
55°
42°
19
64°
37°
20
68°
42°
21
68°
50°
22
71°
44°
23
81°
48°
24
85°
58°
25
84°
62°
26
81°
56°
27
83°
54°
28
81°
51°
29
71°
52°
30
74°
50°
31
81°
53°
1
81°
53°
2
84°
58°
3
92°
66°
4
86°
61°
5
86°
63°
6
85°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riverdale
Riverdale's May 2026 forecast shows daily high temperatures ranging from 71° to 92°, with overnight lows between 50° and 66°. The average high for May is 82° with an average low of 57°. 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 Riverdale. See also: June | July | August.