California - West coast weather in September 2025
California - West coast weather in September 2025
Day
23 °C
Night
12 °C
Sea
15 °C
Precipitation
7 mm
in month
Rainy days
1 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
72 %
Day
23 °C
Night
12 °C
Sea
15 °C
Precipitation
7 mm
in month
Rainy days
1 days
in month
Daylight
12 hours
average
Sunshine
9 hours
average
Humidity
72 %
Overview: California - West coastEmbark on a breathtaking journey along California's stunning West Coast, where natural beauty and coastal charm collide. Discover the captivating coastal towns of Monterey, Santa Cruz, and Pismo Beach, each offering a unique blend of picturesque landscapes and vibrant communities. Immerse yourself in the world-famous Monterey Bay Aquarium, ride the iconic Giant Dipper roller coaster in Santa Cruz, and unwind on the pristine sandy shores of Pismo Beach. Whether you seek outdoor adventures, cultural experiences, or simply a relaxing beach getaway, California's West Coast is a true haven for every traveler.
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Weather overview and FAQs
Weather overview
In California - West coast in September, the average air temperature ranges from 23 °C (73 °F) during the day to 12 °C (53 °F) at night. There are 1 day of rain on average, where the rainfall is 7 mm (0.29 in).
Are there good conditions to visit in September in California - West coast?
September is one of the best months to visit California - West coast. You can expect just 1 day of rain during the month, taking an umbrella is not necessary. There are some people, who may feel a slight chill at 23 °C (73 °F), but others will feel perfectly fine. The temperature of 12 °C (53 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
How many rainy days can I expect in September in California - West coast?
There are 1 day, which are rainy in California - West coast in September, that is, days with precipitation more than 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.
What is the temperature in California - West coast during the day in September?
In September in California - West coast, the average daily temperatures will be 23 °C (73 °F). A comfortable temperature for most people, where it is neither too cold nor too hot, and a large number of activities can be carried out comfortably, including sunbathing by the water. Lighter clothing will be suitable - shorts, skirts, t-shirts, jackets; a light sweater and long trousers may also be useful.
What is the sea temperature in September in California - West coast?
In California - West coast in September expect the sea to be warm at 15 °C (59 °F). This is a sea temperature for resilient people only, most people won't enjoy swimming in such cold water or will have to use a wetsuit for water activities.
What is the night temperature in California - West coast in September?
The average night temperature in California - West coast in September is 12 °C (53 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
What level of humidity is to expect in September in California - West coast?
Humidity in September in California - West coast is 72 %.
How many sunny hours can I expect in September in California - West coast?
In California - West coast in September, you can expect around 9 hours of sunshine.
Is September part of the dry season in California - West coast?
Yes, there is a dry season in California - West coast in September with just 1 day during the month being rainy.
How long is the day (from dawn till dusk) in California - West coast in September?
The length of daylight in California - West coast in September is 12 hours.
How windy is California - West coast in September?
An average wind scale that can be expected in California - West coast in September is 4.
Is California - West coast rainier in September than in October?
No, in September in California - West coast it does not rain more than in October.
Is the weather in California - West coast warmer in September than in August?
Yes, September in California - West coast is warmer than August by 1 °C (33 °F).