S
M
T
W
T
F
S
26
81°
61°
27
81°
62°
28
82°
63°
29
81°
62°
30
82°
63°
31
86°
65°
1
87°
67°
2
87°
67°
3
85°
66°
4
85°
65°
5
84°
65°
6
83°
66°
7
84°
65°
8
84°
65°
9
85°
67°
10
87°
66°
11
86°
63°
12
85°
62°
13
84°
65°
14
85°
67°
15
86°
68°
16
87°
67°
17
88°
68°
18
89°
68°
19
88°
67°
20
89°
68°
21
89°
67°
22
88°
67°
23
89°
66°
24
89°
67°
25
87°
68°
26
87°
67°
27
88°
67°
28
88°
65°
29
86°
64°
30
84°
65°
31
85°
63°
1
86°
63°
2
85°
62°
3
84°
60°
4
82°
61°
5
81°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in La Mesa
La Mesa's August 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 60° and 68°. The average high for August is 85° with an average low of 65°. 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 La Mesa. See also: September | October | November.
