S
M
T
W
T
F
S
26
90°
73°
27
93°
77°
28
93°
72°
29
97°
77°
30
95°
73°
31
91°
72°
1
86°
73°
2
86°
75°
3
90°
73°
4
91°
73°
5
93°
72°
6
90°
72°
7
91°
70°
8
91°
72°
9
93°
73°
10
95°
72°
11
95°
73°
12
91°
72°
13
95°
75°
14
94°
74°
15
92°
74°
16
94°
74°
17
95°
76°
18
95°
75°
19
96°
73°
20
93°
72°
21
95°
71°
22
91°
71°
23
93°
72°
24
90°
70°
25
93°
70°
26
91°
71°
27
91°
72°
28
90°
73°
29
88°
72°
30
89°
70°
31
90°
71°
1
89°
71°
2
90°
72°
3
90°
72°
4
89°
71°
5
89°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Monticello
Monticello's August 2026 forecast shows daily high temperatures ranging from 88° to 96°, with overnight lows between 70° and 76°. The average high for August is 92° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Monticello. See also: September | October | November.
