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

December 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 winter, December, is still a comfortable month in Santa Barbara, California, with temperature in the range of an average low of 46.8°F (8.2°C) and an average high of 64.8°F (18.2°C).

Temperature

January and December, with an average high-temperature of 64.8°F (18.2°C), are the coldest months.

Rainfall

In Santa Barbara, during 4.9 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Santa Barbara, during the entire year, the rain falls for 37 days and collects up to 18.1" (459mm) of precipitation.

Ocean temperature

In December, the average ocean temperature is 58.5°F (14.7°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

December has the shortest days of the year, with an average of 9.9h of daylight.

Sunshine

January, November and December, with an average of 6h of sunshine, are months with the least sunshine in Santa Barbara.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Santa Barbara, California. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 are the coldest months in Santa Barbara?

January and December, with an average high-temperature of 64.8°F (18.2°C), are the coldest months in Santa Barbara.

What is the temperature in December in Santa Barbara?

The average high-temperature, in December, in Santa Barbara, is 64.8°F (18.2°C), while the average low-temperature is 46.8°F (8.2°C).

How many days does it rain in December in Santa Barbara?

In Santa Barbara, California, in December, during 4.9 rainfall days, 2.6" (66mm) of precipitation is typically accumulated.

What is the water temperature in December in Santa Barbara?

In December, the average ocean temperature in Santa Barbara is 58.5°F (14.7°C). Swimming in 58.5°F (14.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Santa Barbara?

With an average of 9.9h of daylight, December has the shortest days of the year.

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

The average length of the day in December in Santa Barbara, California, is 9.9h.

What is the month with the least sunshine in Santa Barbara?

January, November and December, with an average of 6h of sunshine, are months with the least sunshine.

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

The average sunshine in December is 6h.

What is the month with the lowest UV index in Santa Barbara?

January and December, with an average maximum UV index of 3, are months with the lowest UV index.

What is the UV index reading in December in Santa Barbara?

In December, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.
Average temperature in December - Santa Barbara, CA
  • Average high temperature in December: 64.7°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 December: 46.7°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 December - Santa Barbara, CA
  • Average rainfall in December: 2.6"

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 December - Santa Barbara, CA
  • Average rainfall days in December: 4.9 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 December - Santa Barbara, CA
  • Average sea temperature in December: 58.5°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 December / Average sunshine in December - Santa Barbara, CA
  • Average daylight in December: 9.9h

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 December: 6h

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 December - Santa Barbara, CA
  • Average UV index in December: 3

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).