Carlsbad
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Carlsbad, CA

A bird
A bird's eye view of the skyline and clear coastline of Carlsbad in California
The first month of the autumn, September, is still a pleasant month in Carlsbad, California, with temperature in the range of an average low of 61°F (16.1°C) and an average high of 73°F (22.8°C).

Temperature

In Carlsbad, the average high-temperature is essentially the same as in August - a pleasant 73°F (22.8°C). In Carlsbad, California, the average low-temperature is 61°F (16.1°C).

Rainfall

In Carlsbad, 0.3" (7.4mm) of precipitation is typically accumulated. Throughout the year, 11.1" (282.7mm) of rain is accumulated.

Ocean temperature

In Carlsbad, the average seawater temperature is 66.9°F (19.4°C). For most, swimming in 66.9°F (19.4°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In Carlsbad, the average length of the day in September is 12.4h.

What is the temperature in September in Carlsbad?

In Carlsbad, California, in September, the average high-temperature is 73°F (22.8°C), and the average low-temperature is 61°F (16.1°C).

How much does it rain in Carlsbad in September?

During September, Carlsbad regularly aggregates up to 0.3" (7.4mm) of precipitation.

What is the ocean temperature in September in Carlsbad?

In September, the average ocean temperature in Carlsbad, California, is 66.9°F (19.4°C). For swimming, a surface water temperature of 66.9°F (19.4°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Carlsbad?

In Carlsbad, California, the average length of the day in September is 12.4h.
Average temperature in September - Carlsbad, CA
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is August (74°F).
Months with the lowest average high temperature are January, February and March (64°F).

  • Average low temperature in September: 61°F

The month with the highest average low temperature is August (64°F).
Coldest months (with the lowest average low temperature) are January and December (45°F).

Average rainfall in September - Carlsbad, CA
  • Average rainfall in September: 0.3"

The wettest month (with the highest rainfall) is January (2.4").
The driest month (with the lowest rainfall) is July (0").

Average sea temperature in September - Carlsbad, CA
  • Average sea temperature in September: 66.9°F

The best month for swimming (with the highest average sea temperature) is August (68°F).
Coldest months (with the lowest average sea temperature) are January and February (58.7°F).

Average daylight in September - Carlsbad, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).