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
December, known for its average high temperature of 63.9°F (17.7°C) and an average low temperature of 48.4°F (9.1°C), is the coldest month.Humidity
The average relative humidity in December is 53%.Rainfall
December is the month with the most rainfall. Rain falls for 5.5 days and accumulates 0.51" (13mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:38 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:52 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.8h of sunshine.UV index
January, February, 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 threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 4 in December leads to these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
What is the temperature in December?
What is the average humidity in December in Chino Hills?
What is the wettest month?
How much does it rain in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December in Chino Hills?
What is the month with the least sunshine?
How many hours of sunshine does Chino Hills have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Chino Hills, CA
- Average high temperature in December: 63.9°F
The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is December (63.9°F).
- Average low temperature in December: 48.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest months (with the lowest average low temperature) are February and December (48.4°F).
Average pressure in December
Chino Hills, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Chino Hills, CA
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are April and May (5.5mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in December
Chino Hills, CA
- Average humidity in December: 53%
The months with the highest relative humidity are May and June (60%).
The month with the lowest relative humidity is November (48%).
Average rainfall in December
Chino Hills, CA
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is December (0.51").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Chino Hills, CA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is June (0.9 days).
Average daylight in December /
Average sunshine in December
Chino Hills, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Chino Hills, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in December
Chino Hills, CA
- Average UV index in December: 4
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in December
Chino Hills, CA
- Average cloud cover in December: 22
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Chino 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).
Chino Hills, California, USA
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