S
M
T
W
T
F
S
26
56°
47°
27
61°
44°
28
67°
41°
29
71°
43°
30
72°
42°
1
71°
48°
2
57°
50°
3
60°
51°
4
61°
45°
5
61°
50°
6
68°
50°
7
68°
50°
8
70°
49°
9
76°
47°
10
73°
49°
11
79°
48°
12
70°
48°
13
68°
46°
14
79°
46°
15
76°
47°
16
74°
53°
17
72°
48°
18
81°
48°
19
86°
47°
20
82°
49°
21
83°
48°
22
66°
47°
23
59°
52°
24
58°
51°
25
56°
49°
26
65°
47°
27
66°
44°
28
66°
51°
29
66°
51°
30
72°
50°
31
78°
45°
1
82°
49°
2
70°
48°
3
85°
46°
4
82°
49°
5
86°
51°
6
77°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Monte Rio
Monte Rio's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Monte Rio. See also: June | July | August.
