S
M
T
W
T
F
S
26
89°
70°
27
88°
69°
28
87°
65°
29
86°
66°
30
89°
66°
31
94°
65°
1
95°
67°
2
92°
70°
3
96°
64°
4
84°
68°
5
75°
68°
6
71°
70°
7
94°
67°
8
99°
69°
9
90°
74°
10
93°
72°
11
80°
71°
12
86°
70°
13
72°
70°
14
88°
68°
15
84°
68°
16
86°
67°
17
72°
71°
18
74°
68°
19
93°
67°
20
89°
69°
21
100°
68°
22
96°
68°
23
97°
68°
24
98°
69°
25
99°
68°
26
98°
67°
27
97°
68°
28
94°
68°
29
95°
67°
30
96°
67°
31
93°
65°
1
90°
65°
2
93°
67°
3
89°
64°
4
87°
63°
5
91°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in El Cajon
El Cajon's August 2026 forecast shows daily high temperatures ranging from 87° to 100°, with overnight lows between 63° and 69°. The average high for August is 95° with an average low of 67°. 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 El Cajon. See also: September | October | November.
