S
M
T
W
T
F
S
26
96°
70°
27
94°
68°
28
88°
65°
29
90°
66°
30
90°
64°
31
95°
65°
1
92°
65°
2
92°
65°
3
89°
64°
4
87°
63°
5
86°
64°
6
85°
68°
7
87°
67°
8
86°
66°
9
84°
65°
10
84°
68°
11
83°
67°
12
81°
68°
13
82°
66°
14
81°
64°
15
81°
66°
16
82°
66°
17
79°
63°
18
80°
64°
19
82°
67°
20
83°
65°
21
83°
66°
22
85°
66°
23
85°
67°
24
84°
67°
25
85°
66°
26
85°
66°
27
84°
65°
28
85°
66°
29
84°
65°
30
85°
66°
31
85°
66°
1
84°
65°
2
85°
65°
3
82°
64°
4
81°
65°
5
81°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rancho Bernardo
Rancho Bernardo's August 2026 forecast shows daily high temperatures ranging from 79° to 92°, with overnight lows between 63° and 68°. The average high for August is 84° with an average low of 66°. 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 Rancho Bernardo. See also: September | October | November.
