S
M
T
W
T
F
S
30
81°
63°
31
79°
62°
1
78°
62°
2
79°
61°
3
80°
62°
4
79°
61°
5
79°
63°
6
81°
64°
7
81°
62°
8
78°
63°
9
77°
62°
10
78°
62°
11
77°
63°
12
78°
64°
13
80°
62°
14
81°
63°
15
80°
62°
16
78°
61°
17
79°
60°
18
78°
63°
19
79°
58°
20
78°
58°
21
81°
62°
22
81°
61°
23
Hist. Avg.
77°
58°
24
Hist. Avg.
77°
58°
25
Hist. Avg.
77°
58°
26
Hist. Avg.
77°
58°
27
Hist. Avg.
77°
58°
28
Hist. Avg.
77°
57°
29
Hist. Avg.
76°
57°
30
Hist. Avg.
76°
57°
1
Hist. Avg.
76°
57°
2
Hist. Avg.
76°
56°
3
Hist. Avg.
76°
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 77° to 81°, with overnight lows between 58° and 64°. The average high for September is 79° with an average low of 62°. 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.
