S
M
T
W
T
F
S
26
81°
70°
27
89°
73°
28
85°
75°
29
85°
72°
30
76°
64°
1
70°
55°
2
75°
51°
3
82°
53°
4
83°
62°
5
90°
66°
6
87°
66°
7
69°
64°
8
79°
64°
9
92°
70°
10
93°
64°
11
85°
63°
12
86°
62°
13
90°
61°
14
91°
60°
15
92°
65°
16
88°
70°
17
90°
74°
18
91°
76°
19
91°
64°
20
84°
64°
21
85°
65°
22
90°
65°
23
87°
64°
24
87°
69°
25
87°
67°
26
85°
62°
27
86°
63°
28
87°
63°
29
89°
70°
30
84°
73°
31
87°
70°
1
92°
70°
2
91°
71°
3
88°
70°
4
85°
68°
5
83°
68°
6
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rio Frio
Rio Frio's May 2026 forecast shows daily high temperatures ranging from 83° to 92°, with overnight lows between 68° and 72°. The average high for May is 88° with an average low of 70°. 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 Rio Frio. See also: June | July | August.