December weather forecast
Del Mar, CA

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Weather in December

The first month of the winter, December, is still a refreshing month in Del Mar, California, with temperature in the range of an average low of 52.5°F (11.4°C) and an average high of 63°F (17.2°C).

Temperature

Del Mar's temperatures tend to hit their minimum during February and December, with an average high-temperature of 63°F (17.2°C).

Humidity

In December, the average relative humidity is 63%.

Rainfall

The month with the most rainfall is December, when the rain falls for 5.3 days and typically aggregates up to 1.06" (27mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of December, sunrise is at 6:34 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:53 pm PST.

Sunshine

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

UV index

January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: In December, an average UV index of 4 transforms into the following instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Frequently asked questions

What is the coldest time of year?

Del Mar's coldest season falls during February and December, averaging a high-temperature of 63°F (17.2°C).

What is the temperature in December?

December temperatures in Del Mar vary between a high-temperature of 63°F (17.2°C) and a low-temperature of 52.5°F (11.4°C).

What is the average humidity in December?

In December, the average relative humidity is 63%.

What is the rainiest month?

The month with the most rainfall is December, when the rain falls for 5.3 days and typically aggregates up to 1.06" (27mm) of precipitation.

How many days does it rain in December?

In December, the rain falls for 5.3 days. Throughout December, 1.06" (27mm) of precipitation is accumulated.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 0min of daylight.

What is the average length of the day in December?

In Del Mar, the average day length in December is 10h and 1min.

When is the sunrise / sunset in December in Del Mar?

On the first day of December, sunrise is at 6:34 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:53 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.

How many hours of sunshine does Del Mar have in December?

In December, the average sunshine duration is 6.6h.

When is the lowest UV index?

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

What is the UV index intensity in December in Del Mar?

The average daily maximum UV index in December in Del Mar is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Del Mar, CA

Average temperature in December - Del Mar, CA
  • Average high temperature in December: 63°F

The warmest month (with the highest average high temperature) is September (76.6°F).
The months with the lowest average high temperature are February and December (63°F).

  • Average low temperature in December: 52.5°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 (51.8°F).

Average pressure in December
Del Mar, CA

Average pressure in December - Del Mar, CA
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).

Average wind speed in December
Del Mar, CA

Average wind speed in December - Del Mar, CA
  • Average wind speed in December: 5.7mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).

Average humidity in December
Del Mar, CA

Average humidity in December - Del Mar, CA
  • Average humidity in December: 63%

The month with the highest relative humidity is June (75%).
The month with the lowest relative humidity is November (60%).

Average rainfall in December
Del Mar, CA

Average rainfall in December - Del Mar, CA
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is December (1.06").
The driest month (with the least rainfall) is June (0.12").

Average rainfall days in December
Del Mar, CA

Average rainfall days in December - Del Mar, CA
  • Average rainfall days in December: 5.3 days

The month with the highest number of rainy days is March (7.4 days).
The month with the least rainy days is August (2.8 days).

Average daylight in December /
Average sunshine in December
Del Mar, CA

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

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in December
Del Mar, CA

Average sunshine days in December - Del Mar, CA
  • Average sunshine days in December: 24.2 days

The month with the most sunshine days is October (25.9 days).
The month with the least sunshine days is February (21 days).

Average UV index in December
Del Mar, CA

Average UV index in December - Del Mar, CA
  • Average UV index in December: 4

The months with the highest UV index are July and August (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
Del Mar, CA

Average cloud cover in December - Del Mar, 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 9).

Average visibility in December
Del Mar, CA

Average visibility in December - Del Mar, 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).

Del Mar, California, USA

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