Cayucos Weather in September

What's the weather like in Cayucos (California) in September 2025?

The climate in Cayucos during September can be summarized as warm and very dry.

September is in the fall / autumn in Cayucos and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 26°C (79°F), whilst at night 12°C (53°F) is normal.

Cayucos weather averages (imperial / metric)
Daytime temperature 25.9°C 78.6°F
Nightly temperature 11.7°C 53.1°F
Average temperature 18.8°C 65.8°F
Daily sunshine 10.1 hrs
Avg rainfall 9 mm 0.3 ins
Rainy days 2 days
Sea temperature 17°C 62.6°F
Humidity 75%
Windspeed 11.5kph 7 mph

On average September is the 5th driest month of the year in Cayucos with around 9mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 10.1 hours of sunshine per day.

September temperatures in Cayucos

Cayucos average temperature in September

September rainfall

Cayucos average rain in September

September hourly sunshine

Cayucos average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cayucos in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Cayucos weather stats

Cayucos weather statistics
Hottest month: August 26°C 78.8°F
Driest month: July 1mm 0ins
Sunniest month: April 11.1hrs
Coldest month: January 16.2°C 61.2°F
Wettest month: January 114mm 4.5ins
Map showing location of Cayucos (35.44275, -120.89213) Cayucos map pin © Google

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