S
M
T
W
T
F
S
26
92°
76°
27
93°
70°
28
90°
69°
29
90°
70°
30
93°
74°
31
96°
75°
1
95°
74°
2
95°
76°
3
94°
70°
4
93°
70°
5
89°
71°
6
89°
70°
7
90°
71°
8
91°
70°
9
91°
74°
10
95°
75°
11
95°
75°
12
93°
74°
13
94°
75°
14
96°
70°
15
95°
69°
16
90°
69°
17
91°
70°
18
95°
73°
19
94°
69°
20
89°
67°
21
90°
68°
22
91°
73°
23
94°
73°
24
89°
72°
25
89°
73°
26
91°
73°
27
94°
72°
28
94°
74°
29
93°
72°
30
95°
68°
31
90°
70°
1
93°
71°
2
93°
72°
3
94°
71°
4
93°
72°
5
93°
71°
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 89° to 96°, with overnight lows between 67° 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.
