S
M
T
W
T
F
S
30
92°
64°
31
91°
64°
1
92°
62°
2
88°
61°
3
87°
65°
4
89°
68°
5
92°
67°
6
94°
66°
7
93°
67°
8
93°
67°
9
94°
66°
10
93°
68°
11
93°
68°
12
92°
65°
13
93°
63°
14
84°
59°
15
83°
60°
16
84°
60°
17
84°
62°
18
86°
63°
19
89°
60°
20
82°
62°
21
87°
63°
22
88°
62°
23
89°
55°
24
87°
54°
25
79°
53°
26
Hist. Avg.
86°
59°
27
Hist. Avg.
85°
58°
28
Hist. Avg.
85°
58°
29
Hist. Avg.
85°
57°
30
Hist. Avg.
84°
57°
1
Hist. Avg.
84°
57°
2
Hist. Avg.
84°
56°
3
Hist. Avg.
84°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Carlsbad
Carlsbad's September 2026 forecast shows daily high temperatures ranging from 79° to 94°, with overnight lows between 53° and 68°. The average high for September is 89° 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 Carlsbad. See also: October | November | December.
