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
77°
47°
9
80°
52°
10
79°
52°
11
80°
50°
12
74°
52°
13
77°
48°
14
76°
50°
15
78°
48°
16
82°
47°
17
78°
49°
18
74°
47°
19
76°
49°
20
76°
48°
21
75°
47°
22
71°
46°
23
72°
47°
24
73°
48°
25
72°
47°
26
72°
47°
27
75°
46°
28
72°
47°
29
79°
51°
30
80°
51°
31
80°
50°
1
79°
51°
2
77°
51°
3
74°
49°
4
73°
50°
5
73°
49°
6
74°
47°
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 71° to 82°, with overnight lows between 46° and 52°. The average high for May is 76° with an average low of 49°. 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.
