Santa Barbara
California, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Santa Barbara, CA

Orange rooftops of the courthouse buildings of Santa Barbara in California, Pacific Ocean
Orange rooftops of the courthouse buildings of Santa Barbara in California, Pacific Ocean
The first month of the autumn, September, is also a moderately hot month in Santa Barbara, California, with average temperature varying between 75°F (23.9°C) and 59.5°F (15.3°C).

Temperature

In Santa Barbara, California, the average high-temperature is relatively the same as in August - a still warm 75°F (23.9°C). The average low-temperature, in September, is 59.5°F (15.3°C).

Rainfall

In September, the rain falls for 1.2 days. Throughout September, 0.3" (7mm) of precipitation is accumulated. Throughout the year, there are 37 rainfall days, and 18.1" (459mm) of precipitation is accumulated.

Ocean temperature

In Santa Barbara, in September, the average water temperature is 61.3°F (16.3°C).
Note: For most, swimming in 61.3°F (16.3°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 September, the average length of the day is 12.4h.

Sunshine

In Santa Barbara, the average sunshine in September is 9h.

UV index

The average daily maximum UV index is 8. A UV Index reading of 8 to 10 represents a very high threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 8 translate into the following recommendations:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Santa Barbara?

The average high-temperature, in September, in Santa Barbara, California, is 75°F (23.9°C), while the average low-temperature is 59.5°F (15.3°C).

How much does it rain in Santa Barbara in September?

In Santa Barbara, California, in September, it is raining for 1.2 days, with typically 0.3" (7mm) of accumulated precipitation.

What is the ocean temperature in September in Santa Barbara?

In September, the average ocean temperature in Santa Barbara is 61.3°F (16.3°C). Swimming in 61.3°F (16.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Santa Barbara?

The average length of the day in September in Santa Barbara, California, is 12.4h.

How long on average sun shines in September in Santa Barbara?

In Santa Barbara, the average sunshine in September is 9h.

What is the UV index intensity in September in Santa Barbara?

The average daily maximum UV index in September in Santa Barbara, California, is 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Santa Barbara, CA
  • Average high temperature in September: 75.1°F

The warmest month (with the highest average high temperature) is August (76°F).
Months with the lowest average high temperature are January and December (64.7°F).

  • Average low temperature in September: 59.6°F

Months with the highest average low temperature are July and August (60.4°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).

Average rainfall in September - Santa Barbara, CA
  • Average rainfall in September: 0.3"

The wettest month (with the highest rainfall) is January (3.8").
Driest months (with the lowest rainfall) are June, July and August (0.1").

Average rainfall days in September - Santa Barbara, CA
  • Average rainfall days in September: 1.2 days

Months with the highest number of rainy days are January and March (6.5 days).
The month with the lowest number of rainy days is July (0.4 days).

Average sea temperature in September - Santa Barbara, CA
  • Average sea temperature in September: 61.3°F

The best month for swimming (with the highest average sea temperature) is August (62.2°F).
The coldest month (with the lowest average sea temperature) is April (55.7°F).

Average daylight in September / Average sunshine in September - Santa Barbara, CA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9h

The month with most sunshine is July (Average sunshine: 11h).
Months with least sunshine are January, November and December (Average sunshine: 6).

Average UV index in September - Santa Barbara, CA
  • Average UV index in September: 8

Months with the highest UV index are June and July (UV index 10).
Months with the lowest UV index are January and December (UV index 3).