S
M
T
W
T
F
S
26
84°
63°
27
85°
63°
28
84°
62°
29
85°
63°
30
86°
64°
31
86°
64°
1
83°
63°
2
79°
62°
3
78°
60°
4
78°
62°
5
79°
62°
6
78°
61°
7
78°
57°
8
79°
59°
9
79°
60°
10
80°
61°
11
82°
62°
12
80°
61°
13
79°
60°
14
83°
58°
15
80°
61°
16
77°
61°
17
81°
60°
18
82°
61°
19
81°
60°
20
78°
55°
21
78°
53°
22
76°
52°
23
76°
54°
24
77°
54°
25
78°
53°
26
78°
59°
27
82°
57°
28
81°
57°
29
79°
58°
30
78°
53°
31
81°
51°
1
74°
52°
2
73°
56°
3
75°
57°
4
75°
51°
5
77°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Montebello
Montebello's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 51° and 64°. The average high for August is 80° with an average low of 58°. 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 Montebello. See also: September | October | November.