S
M
T
W
T
F
S
26
61°
45°
27
73°
45°
28
63°
50°
29
59°
45°
30
55°
43°
1
50°
37°
2
46°
32°
3
61°
34°
4
73°
46°
5
64°
43°
6
54°
41°
7
57°
36°
8
64°
45°
9
72°
52°
10
63°
50°
11
68°
39°
12
72°
37°
13
59°
45°
14
63°
43°
15
64°
39°
16
77°
57°
17
82°
61°
18
86°
64°
19
84°
64°
20
68°
52°
21
64°
48°
22
59°
50°
23
64°
59°
24
N/A
25
77°
54°
26
82°
61°
27
79°
60°
28
78°
52°
29
76°
55°
30
75°
53°
31
73°
53°
1
74°
55°
2
77°
53°
3
78°
55°
4
78°
57°
5
77°
59°
6
79°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Monticello
Monticello's May 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 52° and 61°. The average high for May is 77° with an average low of 56°. 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 Monticello. See also: June | July | August.
