S
M
T
W
T
F
S
28
89°
73°
29
90°
74°
30
93°
74°
1
93°
73°
2
90°
71°
3
93°
71°
4
93°
72°
5
92°
72°
6
92°
73°
7
90°
74°
8
90°
75°
9
91°
74°
10
90°
72°
11
90°
72°
12
90°
73°
13
90°
72°
14
90°
72°
15
93°
75°
16
92°
74°
17
90°
72°
18
90°
74°
19
94°
74°
20
94°
73°
21
91°
73°
22
92°
74°
23
90°
74°
24
91°
73°
25
92°
74°
26
93°
74°
27
90°
73°
28
90°
72°
29
90°
73°
30
94°
74°
31
94°
74°
1
92°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Monticello
Monticello's July 2026 forecast shows daily high temperatures ranging from 89° to 94°, with overnight lows between 71° and 76°. The average high for July is 91° with an average low of 73°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Monticello. See also: August | September | October.