December weather forecastRancho Palos Verdes, CA
December
Weather in December
The first month of the winter, December, is still a comfortable month in Rancho Palos Verdes, California, with an average temperature varying between 54°F (12.2°C) and 61.9°F (16.6°C).Temperature
December begins with an average high-temperature of a still refreshing 61.9°F (16.6°C), reflecting close similarity to the preceding month. In December, Rancho Palos Verdes's nights cool slightly to a consistent average temperature of 54°F (12.2°C).Humidity
The average relative humidity in December is 62%.Rainfall
In December, in Rancho Palos Verdes, the rain falls for 6.4 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. In Rancho Palos Verdes, during the entire year, the rain falls for 62.1 days and collects up to 8.62" (219mm) of precipitation.Ocean temperature
In Rancho Palos Verdes, the average seawater temperature in December is 60.4°F (15.8°C).Note: Swimming in 60.4°F (15.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).
Daylight
December has the shortest days of the year in Rancho Palos Verdes, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 6:40 am and sunset at 4:44 pm. On the last day of December, in Rancho Palos Verdes, California, sunrise is at 6:58 am and sunset at 4:55 pm PST.
Sunshine
January and December, with an average of 6.7h of sunshine, are months with the least sunshine in Rancho Palos Verdes.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 reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In December, a daily UV index of 4 turns into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rancho Palos Verdes, CA
- Average high temperature in December: 61.9°F
The warmest months (with the highest average high temperature) are August and September (73.2°F).
The month with the lowest average high temperature is February (61.5°F).
- Average low temperature in December: 54°F
The month with the highest average low temperature is September (64.2°F).
The coldest month (with the lowest average low temperature) is February (53.2°F).
Average pressure in December
Rancho Palos Verdes, 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 (29.9"Hg).
Average wind speed in December
Rancho Palos Verdes, CA
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).
Average humidity in December
Rancho Palos Verdes, CA
- Average humidity in December: 62%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is November (61%).
Average rainfall in December
Rancho Palos Verdes, CA
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is January (1.73").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
Rancho Palos Verdes, CA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is August (3.1 days).
Average sea temperature in December
Rancho Palos Verdes, CA
- Average sea temperature in December: 60.4°F
The best months for swimming (with the highest average sea temperature) are July and August (67.9°F).
The coldest month (with the lowest average sea temperature) is January (58.3°F).
Average daylight in December /
Average sunshine in December
Rancho Palos Verdes, 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 42min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 6h and 42min).
Average sunshine days in December
Rancho Palos Verdes, CA
- Average sunshine days in December: 23.3 days
The month with the most sunshine days is January (23.9 days).
The month with the least sunshine days is June (20 days).
Average UV index in December
Rancho Palos Verdes, CA
- Average UV index in December: 4
The month with the highest UV index is 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 Palos Verdes, CA
- Average cloud cover in December: 23
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in December
Rancho Palos Verdes, 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).
