S
M
T
W
T
F
S
31
78°
45°
1
82°
49°
2
70°
48°
3
85°
46°
4
82°
49°
5
86°
51°
6
77°
49°
7
75°
43°
8
71°
45°
9
74°
54°
10
90°
50°
11
95°
56°
12
83°
53°
13
78°
50°
14
70°
55°
15
74°
53°
16
69°
50°
17
65°
54°
18
62°
54°
19
62°
55°
20
69°
55°
21
77°
51°
22
71°
51°
23
69°
51°
24
65°
50°
25
67°
52°
26
67°
50°
27
69°
55°
28
78°
46°
29
85°
50°
30
80°
49°
1
78°
52°
2
78°
51°
3
80°
52°
4
81°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Monte Rio
Monte Rio's June 2026 forecast shows daily high temperatures ranging from 78° to 85°, with overnight lows between 49° and 52°. The average high for June is 80° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Monte Rio. See also: July | August | September.