S
M
T
W
T
F
S
26
83°
62°
27
85°
62°
28
86°
64°
29
87°
66°
30
89°
67°
31
89°
67°
1
88°
68°
2
90°
68°
3
90°
67°
4
89°
67°
5
89°
66°
6
87°
66°
7
87°
67°
8
89°
68°
9
90°
68°
10
90°
67°
11
89°
68°
12
90°
68°
13
89°
65°
14
87°
67°
15
91°
67°
16
90°
66°
17
90°
64°
18
89°
65°
19
88°
64°
20
89°
66°
21
90°
68°
22
92°
69°
23
93°
69°
24
93°
68°
25
92°
69°
26
93°
68°
27
93°
68°
28
92°
67°
29
93°
66°
30
92°
65°
31
90°
66°
1
92°
66°
2
92°
67°
3
91°
65°
4
92°
61°
5
88°
62°
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 83° to 93°, with overnight lows between 61° and 69°. The average high for August is 90° 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 El Cajon. See also: September | October | November.
