December weather forecast
Rancho Santa Fe, CA

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Weather in December

December, the first month of the winter in Rancho Santa Fe, is also an enjoyable month, with an average temperature ranging between max 63°F (17.2°C) and min 52.5°F (11.4°C).

Temperature

February and December mark Rancho Santa Fe's lowest temperatures, averaging a high-temperature of 63°F (17.2°C).

Humidity

In Rancho Santa Fe, the average relative humidity in December is 63%.

Rainfall

December is the month with the most rainfall. Rain falls for 5.3 days and accumulates 1.06" (27mm) of precipitation.

Daylight

The month with the shortest days is December, with an average of 10h and 0min of daylight.
On the first day of December in Rancho Santa Fe, California, sunrise is at 6:34 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:52 pm PST.

Sunshine

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

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 value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: The UV index of 4 during December leads to these advisories:
Ensure safety - Imperative it is to shield skin and eyes from damage. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

The coldest period falls in February and December, when the average high-temperature reaches 63°F (17.2°C).

What is the usual temperature for Rancho Santa Fe in December?

The average high-temperature, in December, in Rancho Santa Fe, is 63°F (17.2°C), while the average low-temperature is 52.5°F (11.4°C).

What is the average humidity in December?

In December, the average relative humidity is 63%.

What is the wettest 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 much 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?

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

What is the average length of the day in December?

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

When is the sunrise / sunset in December?

On the first day of December in Rancho Santa Fe, sunrise is at 6:34 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 4:52 pm PST.

What is the month with the least sunshine?

December has the least sunshine of the year in Rancho Santa Fe, with an average of 6.6h of sunshine.

How long on average sun shines in December?

In Rancho Santa Fe, the average sunshine duration in December is 6.6h.

What is the month with 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?

The average daily maximum UV index in December is 4. A UV Index reading of 3 to 5 represents 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
Rancho Santa Fe, CA

Average temperature in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average pressure in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average wind speed in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average humidity in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average rainfall in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average rainfall days in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average daylight in December / Average sunshine in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average sunshine days in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average UV index in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average cloud cover in December - Rancho Santa Fe, 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
Rancho Santa Fe, CA

Average visibility in December - Rancho Santa Fe, 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).

Rancho Santa Fe, California, USA

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