California - South coast weather in September 2025
September
California - South coast weather in September 2025
September
Day
26 °C
Night
16 °C
Sea
20 °C
Precipitation
5 mm
in month
Rainy days
1 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
71 %
Day
26 °C
Night
16 °C
Sea
20 °C
Precipitation
5 mm
in month
Rainy days
1 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
71 %
Overview: California - South coastWelcome to the South Coast of California, a region brimming with natural wonders, vibrant cities, and sun-kissed beaches. Explore the otherworldly landscapes of Joshua Tree National Park, where towering Joshua trees and rugged rock formations create an awe-inspiring backdrop. Indulge in the luxurious coastal beauty of Laguna Beach and Malibu, where pristine beaches and glamorous communities await. Experience the desert oasis of Palm Springs, famous for its mid-century modern architecture and rejuvenating hot springs. And no visit to the South Coast would be complete without immersing yourself in the vibrant cultures of Los Angeles and San Diego, home to world-class entertainment, iconic landmarks, and a laid-back California lifestyle. Get ready for an unforgettable adventure along California's captivating South Coast.
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Weather overview and FAQs
Weather overview
In California - South coast in September, the average air temperature ranges from 26 °C (79 °F) during the day to 16 °C (60 °F) at night. There are 1 day of rain on average, where the rainfall is 5 mm (0.18 in).
Is September a good month to visit California - South coast?
In September in California - South coast, there are ideal conditions for a vacation. The daily temperatures in this month reach pleasant 26 °C (79 °F). There are only 1 day of rain in the whole month, so you can leave your umbrella at home. A sea temperature of 20 °C (68 °F) can seem colder to some, but others will call it refreshing. The temperature of 16 °C (60 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the temperature in California - South coast during the day in September?
In California - South coast in September, the average daily temperatures will be 26 °C (79 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.
What is the sea temperature in September in California - South coast?
The temperature of the sea in California - South coast in September is 20 °C (68 °F). At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions.
What is the air temperature in September in California - South coast at night?
The average night temperature in California - South coast in September is 16 °C (60 °F). This temperature is pleasant for a wide range of evening, night, and morning activities from sports to sitting outside in restaurants or evening walks.
What is the average number of rainy days in California - South coast in September?
In September in California - South coast, we can expect 1 day to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 0.3 days of the week, or in general - 4 % days.
How many hours of sun to expect in September in California - South coast?
There is an average length of sunshine of 9 hours per day in September in California - South coast.
Is September part of the dry season in California - South coast?
Yes, there is a dry season in California - South coast in September with just 1 day during the month being rainy.
Is California - South coast rainier in September than in August?
Yes, in California - South coast in September it rains more than in August.
What is the humidity in September in California - South coast?
In September in California - South coast, expect humidity around 71 %.
Is the sea in California - South coast warmer in September than in August?
No, the sea temperature in California - South coast in September is not higher than in August.
Is the weather in California - South coast warmer in September than in August?
No, in California - South coast in September the temperature is not higher than in August.
How long is the day (from dawn till dusk) in California - South coast in September?
The length of daylight in California - South coast in September is 12 hours.
How windy is California - South coast in September?
An average wind scale that can be expected in California - South coast in September is 3.
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