S
M
T
W
T
F
S
26
87°
65°
27
87°
69°
28
81°
61°
29
81°
58°
30
85°
56°
31
84°
61°
1
79°
67°
2
81°
64°
3
82°
64°
4
83°
59°
5
84°
62°
6
75°
69°
7
85°
65°
8
85°
65°
9
86°
63°
10
88°
72°
11
77°
65°
12
75°
66°
13
82°
64°
14
79°
69°
15
79°
71°
16
87°
73°
17
82°
61°
18
81°
60°
19
82°
66°
20
82°
63°
21
81°
58°
22
81°
61°
23
77°
56°
24
78°
51°
25
79°
52°
26
84°
59°
27
81°
59°
28
82°
55°
29
82°
58°
30
81°
67°
31
91°
72°
1
92°
72°
2
94°
72°
3
95°
73°
4
94°
71°
5
92°
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 ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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.
