December weather forecast
Newport Beach, CA

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The stunning coastal village of Corona Del Mar, in Newport Beach, California
The stunning coastal village of Corona Del Mar, in Newport Beach, California

Weather in December

December concludes the year in Newport Beach with cooler temperatures and the onset of seasonal festivities. The mercury dips to its annual low, with temperatures ranging between 62.4°F (16.9°C) and 53.1°F (11.7°C). It's the time of year when rainfall reaches its annual peak, totaling up to 0.79" (20mm). Despite the increased number of rainy days, the city of Newport Beach retains its charm, beautifully adorned for the holiday season. The changing weather pattern ushers in cheer, reflecting the vibrant spirit of the holidays.

Temperature

Newport Beach's coldest month, December, generally records average temperatures ranging from a high of 62.4°F (16.9°C) to a low of 53.1°F (11.7°C).

Humidity

The average relative humidity in December is 61%.

Rainfall

December is the month with the most rainfall in Newport Beach. Rain falls for 6.2 days and accumulates 0.79" (20mm) of precipitation.

Ocean temperature

In Newport Beach, in December, the average water temperature is 60.3°F (15.7°C).
Note: In 60.3°F (15.7°C), swimming is not an enjoyable activity for most. As the temperature decreases from 69.8°F (21°C) to 59°F (15°C), it becomes harder to control breathing.

Daylight

The month with the shortest days in Newport Beach is December, with an average of 10h and 0min of daylight.
On the first day of the month, sunrise is at 6:38 am and sunset at 4:43 pm. On the last day of December, sunrise is at 6:56 am and sunset at 4:54 pm PST.

Sunshine

December has the least sunshine of the year, with an average of 6.6h of sunshine.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 4 during December translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Updated: Jun 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Newport Beach's December weather, marked by an average high temperature of 62.4°F (16.9°C) and an average low temperature of 53.1°F (11.7°C), is the coldest in the year.

What is the usual temperature for Newport Beach in December?

In December, the average high-temperature and low-temperature are 62.4°F (16.9°C) and 53.1°F (11.7°C) respectively.

What is the average humidity in December in Newport Beach?

The average relative humidity in December is 61%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 6.2 days and accumulates 0.79" (20mm) of precipitation.

How many days does it rain in December in Newport Beach?

In December, the rain falls for 6.2 days. Throughout December, 0.79" (20mm) of precipitation is accumulated.

What is the ocean temperature in December?

In Newport Beach, in December, the average water temperature is 60.3°F (15.7°C). For most, swimming in 60.3°F (15.7°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).

What is the month with the shortest days?

December has the shortest days of the year, with an average of 10h and 0min of daylight.

How many hours of daylight does Newport Beach have in December?

The average day length in December is 9h and 58min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 6:38 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:54 pm PST.

What is the month with the least sunshine?

With an average of 6.6h of sunshine, December has the least sunshine of the year in Newport Beach.

How long on average sun shines in December?

The average sunshine duration in December is 6.6h.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.

What is the UV index reading in December?

The average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Newport Beach, CA

Average temperature in December - Newport Beach, CA
  • Average high temperature in December: 62.4°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (62.4°F).

  • Average low temperature in December: 53.1°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (52.3°F).

Average pressure in December
Newport Beach, CA

Average pressure in December - Newport Beach, CA
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).

Average wind speed in December
Newport Beach, CA

Average wind speed in December - Newport Beach, CA
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).

Average humidity in December
Newport Beach, CA

Average humidity in December - Newport Beach, CA
  • Average humidity in December: 61%

The month with the highest relative humidity is June (74%).
The month with the lowest relative humidity is November (59%).

Average rainfall in December
Newport Beach, CA

Average rainfall in December - Newport Beach, CA
  • Average rainfall in December: 0.79"

The wettest month (with the highest rainfall) is December (0.79").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in December
Newport Beach, CA

Average rainfall days in December - Newport Beach, CA
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is March (6.6 days).
The month with the least rainy days is June (1.6 days).

Average sea temperature in December
Newport Beach, CA

Average sea temperature in December - Newport Beach, CA
  • Average sea temperature in December: 60.3°F

The best months for swimming (with the highest average sea temperature) are July and August (67.7°F).
The coldest month (with the lowest average sea temperature) is January (58.5°F).

Average daylight in December /
Average sunshine in December
Newport Beach, CA

Average daylight in December / Average sunshine in December - Newport Beach, CA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in December
Newport Beach, CA

Average sunshine days in December - Newport Beach, CA
  • Average sunshine days in December: 23.6 days

The month with the most sunshine days is June (26.5 days).
The month with the least sunshine days is February (20.5 days).

Average UV index in December
Newport Beach, CA

Average UV index in December - Newport Beach, CA
  • Average UV index in December: 4

The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

Average cloud cover in December
Newport Beach, CA

Average cloud cover in December - Newport Beach, CA
  • Average cloud cover in December: 24

The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 8).

Average visibility in December
Newport Beach, CA

Average visibility in December - Newport Beach, CA
  • Average visibility in December: 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).

Newport Beach, California, USA

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