S
M
T
W
T
F
S
30
74°
72°
31
72°
69°
1
71°
66°
2
70°
64°
3
71°
63°
4
76°
65°
5
79°
72°
6
79°
71°
7
79°
71°
8
76°
67°
9
75°
69°
10
74°
67°
11
73°
66°
12
72°
67°
13
68°
63°
14
69°
65°
15
73°
65°
16
72°
64°
17
76°
67°
18
68°
60°
19
69°
62°
20
71°
64°
21
74°
66°
22
72°
66°
23
73°
67°
24
69°
64°
25
70°
66°
26
74°
66°
27
75°
67°
28
75°
67°
29
74°
66°
30
74°
65°
1
74°
66°
2
73°
65°
3
71°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in La Jolla
La Jolla's September 2026 forecast shows daily high temperatures ranging from 68° to 79°, with overnight lows between 60° and 72°. The average high for September is 73° 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 September weather will actually feel in La Jolla. See also: October | November | December.
