S
M
T
W
T
F
S
28
89°
70°
29
91°
71°
30
93°
70°
1
94°
69°
2
93°
69°
3
93°
68°
4
89°
67°
5
90°
69°
6
86°
70°
7
84°
70°
8
86°
67°
9
90°
70°
10
84°
69°
11
80°
67°
12
84°
67°
13
84°
64°
14
85°
65°
15
84°
64°
16
86°
67°
17
87°
68°
18
88°
67°
19
86°
66°
20
88°
67°
21
84°
64°
22
84°
64°
23
86°
66°
24
87°
67°
25
83°
67°
26
83°
68°
27
85°
68°
28
86°
67°
29
87°
68°
30
88°
69°
31
87°
68°
1
86°
69°
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 80° to 90°, with overnight lows between 64° and 70°. The average high for July is 85° with an average low of 67°. 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.