S
M
T
W
T
F
S
30
75°
66°
31
73°
65°
1
72°
65°
2
73°
64°
3
74°
65°
4
73°
65°
5
73°
66°
6
74°
67°
7
75°
66°
8
72°
66°
9
71°
65°
10
72°
66°
11
71°
67°
12
72°
68°
13
74°
66°
14
75°
67°
15
74°
66°
16
73°
65°
17
74°
64°
18
72°
67°
19
73°
64°
20
69°
66°
21
Hist. Avg.
75°
63°
22
Hist. Avg.
74°
63°
23
Hist. Avg.
74°
63°
24
Hist. Avg.
74°
63°
25
Hist. Avg.
74°
63°
26
Hist. Avg.
74°
63°
27
Hist. Avg.
74°
63°
28
Hist. Avg.
74°
62°
29
Hist. Avg.
74°
62°
30
Hist. Avg.
74°
62°
1
Hist. Avg.
74°
62°
2
Hist. Avg.
74°
62°
3
Hist. Avg.
73°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in La Jolla
La Jolla's September 2026 forecast shows daily high temperatures ranging from 69° to 75°, with overnight lows between 64° and 68°. 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.
