S
M
T
W
T
F
S
26
71°
66°
27
74°
67°
28
76°
68°
29
77°
68°
30
77°
67°
31
76°
67°
1
75°
68°
2
76°
67°
3
76°
67°
4
77°
68°
5
77°
67°
6
75°
68°
7
73°
66°
8
72°
67°
9
75°
67°
10
76°
66°
11
77°
67°
12
76°
65°
13
77°
63°
14
75°
63°
15
73°
67°
16
75°
67°
17
77°
68°
18
79°
68°
19
79°
67°
20
78°
67°
21
78°
65°
22
77°
66°
23
75°
66°
24
74°
65°
25
75°
67°
26
76°
67°
27
77°
66°
28
78°
66°
29
78°
65°
30
76°
66°
31
78°
68°
1
77°
67°
2
79°
69°
3
78°
68°
4
78°
68°
5
77°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Tijuana River Valley
Tijuana River Valley's August 2026 forecast shows daily high temperatures ranging from 71° to 79°, with overnight lows between 63° and 69°. The average high for August is 76° 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 Tijuana River Valley. See also: September | October | November.