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