December weather forecastRancho Santa Fe, CA
December
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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 36min
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: 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: 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: 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: 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).
