Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The advent of December reveals an average high-temperature of a still enjoyable 61.9°F (16.6°C), showing minimal difference from the prior month. In Rolling Hills, the month of December records an average minimum temperature of 54°F (12.2°C), a slight dip from the daily highs.Humidity
In December, the average relative humidity is 62%.Rainfall
In December, the rain falls for 6.4 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. Throughout the year, there are 62.1 rainfall days, and 8.62" (219mm) of precipitation is accumulated.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 Rolling Hills, sunrise is at 6:40 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:55 pm PST.
Sunshine
The months with the least sunshine in Rolling Hills are January and December, with an average of 6.7h 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 reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 4 during December morphs into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the average humidity in December?
How many days does it rain in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Rolling Hills have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Rolling Hills, 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
Rolling Hills, 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
Rolling Hills, 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
Rolling Hills, 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
Rolling Hills, 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
Rolling Hills, 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 daylight in December /
Average sunshine in December
Rolling Hills, 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 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
Rolling Hills, 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
Rolling Hills, 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
Rolling Hills, 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
Rolling Hills, 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).
Rolling Hills, California, USA
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