Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The month of September sees the highest average temperatures, reaching 76.3°F (24.6°C) at the peak and 59.9°F (15.5°C) at the low.Humidity
September and October, with an average relative humidity of 61%, are the least humid months.Rainfall
In September, the rain falls for 1.6 days. Throughout September, 0.12" (3mm) of precipitation is accumulated. Throughout the year, there are 53.7 rainfall days, and 8.58" (218mm) of precipitation is accumulated.Ocean temperature
In Cayucos, the average seawater temperature in September is 58.3°F (14.6°C).Note: Beware of 58.3°F (14.6°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.
Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:48 pm PDT.
Sunshine
The average sunshine in September is 11.3h.UV index
In Cayucos, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
What are September temperatures?
What are the least humid months?
What is the average humidity in September?
How much does it rain in September?
What is the water temperature in September?
How many hours of daylight does Cayucos have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Cayucos have in September?
What is the UV index reading in September?
Average temperature in September
Cayucos, CA
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is September (76.3°F).
The month with the lowest average high temperature is December (59.2°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is September (59.9°F).
The coldest month (with the lowest average low temperature) is February (47.3°F).
Average pressure in September
Cayucos, CA
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are June and September (29.91"Hg).
Average wind speed in September
Cayucos, CA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is May (7.9mph).
The calmest months (with the lowest average wind speed) are August and September (6mph).
Average humidity in September
Cayucos, CA
- Average humidity in September: 61%
The month with the highest relative humidity is March (70%).
The months with the lowest relative humidity are September and October (61%).
Average rainfall in September
Cayucos, CA
- Average rainfall in September: 0.12"
The wettest month (with the highest rainfall) is January (1.81").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in September
Cayucos, CA
- Average rainfall days in September: 1.6 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.7 days).
Average sea temperature in September
Cayucos, CA
- Average sea temperature in September: 58.3°F
The best months for swimming (with the highest average sea temperature) are August and October (58.6°F).
The coldest month (with the lowest average sea temperature) is April (54.3°F).
Average daylight in September /
Average sunshine in September
Cayucos, CA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 11h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Cayucos, CA
- Average sunshine days in September: 28.1 days
The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is February (20.1 days).
Average UV index in September
Cayucos, CA
- Average UV index in September: 5
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in September
Cayucos, CA
- Average cloud cover in September: 7
The month with the most cloud cover is March (Cloud cover 28).
The months with the least cloud cover are August and September (Cloud cover 7).
Average visibility in September
Cayucos, CA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Cayucos, California, USA
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