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
85°
70°
12
83°
69°
13
79°
68°
14
83°
67°
15
83°
66°
16
86°
67°
17
88°
66°
18
86°
65°
19
85°
66°
20
83°
63°
21
86°
65°
22
85°
66°
23
88°
67°
24
86°
64°
25
86°
66°
26
87°
67°
27
87°
68°
28
86°
68°
29
87°
67°
30
87°
66°
31
86°
65°
1
86°
65°
2
87°
64°
3
84°
63°
4
85°
63°
5
85°
66°
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 79° to 88°, with overnight lows between 63° and 70°. The average high for August is 85° 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 La Mesa. See also: September | October | November.
