S
M
T
W
T
F
S
30
74°
66°
31
75°
67°
1
76°
64°
2
72°
59°
3
72°
60°
4
73°
62°
5
72°
62°
6
73°
63°
7
74°
62°
8
73°
61°
9
72°
59°
10
72°
60°
11
73°
62°
12
74°
64°
13
75°
62°
14
76°
61°
15
74°
65°
16
74°
65°
17
72°
64°
18
72°
65°
19
73°
65°
20
72°
64°
21
72°
64°
22
75°
63°
23
75°
65°
24
74°
65°
25
78°
64°
26
78°
63°
27
77°
60°
28
75°
60°
29
73°
61°
30
73°
63°
1
75°
64°
2
78°
62°
3
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tijuana River Valley
Tijuana River Valley's September 2026 forecast shows daily high temperatures ranging from 72° to 78°, with overnight lows between 59° and 67°. The average high for September is 74° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Tijuana River Valley. See also: October | November | December.
