S
M
T
W
T
F
S
30
102°
70°
31
101°
76°
1
99°
72°
2
100°
72°
3
103°
73°
4
102°
76°
5
101°
71°
6
99°
75°
7
97°
72°
8
99°
74°
9
99°
74°
10
99°
74°
11
104°
70°
12
106°
71°
13
103°
72°
14
102°
75°
15
99°
71°
16
90°
69°
17
95°
67°
18
95°
70°
19
97°
71°
20
96°
67°
21
97°
64°
22
89°
69°
23
76°
66°
24
80°
64°
25
82°
63°
26
91°
66°
27
93°
62°
28
91°
63°
29
82°
68°
30
82°
64°
1
82°
57°
2
66°
60°
3
75°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Carlsbad
Carlsbad's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
