December weather forecastCoronado, CA
December
Weather in December
The first month of the winter, December, is still a comfortable month in Coronado, California, with an average temperature varying between 63°F (17.2°C) and 53.6°F (12°C).Temperature
February and December, with an average high-temperature of 63°F (17.2°C), are marked as the coldest months.Humidity
The average relative humidity in December is 63%.Rainfall
December is the month with the most rainfall. Rain falls for 6.8 days and accumulates 1.81" (46mm) of precipitation.Ocean temperature
In Coronado, the average seawater temperature in December is 60.4°F (15.8°C).Note: In water with a temperature of 60.4°F (15.8°C), most individuals do not find swimming enjoyable. As the temperature falls from 69.8°F (21°C) to 59°F (15°C), breathing control becomes more difficult.
Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:33 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 4:53 pm PST.
Sunshine
December has the least sunshine of the year, 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 of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 4 in December, converts into the following recommendations:
Take precautions - Protection against sun damage is advised. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Coronado, CA
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is August (75.6°F).
The months with the lowest average high temperature are February and December (63°F).
- Average low temperature in December: 53.6°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (53.1°F).
Average pressure in December
Coronado, 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
Coronado, CA
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is October (5.5mph).
Average humidity in December
Coronado, CA
- Average humidity in December: 63%
The month with the highest relative humidity is June (76%).
The months with the lowest relative humidity are January and November (61%).
Average rainfall in December
Coronado, CA
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Coronado, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (8.4 days).
The month with the least rainy days is June (2.8 days).
Average sea temperature in December
Coronado, CA
- Average sea temperature in December: 60.4°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).
Average daylight in December /
Average sunshine in December
Coronado, 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 42min
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 42min).
Average sunshine days in December
Coronado, CA
- Average sunshine days in December: 21.8 days
The month with the most sunshine days is August (24.8 days).
The month with the least sunshine days is February (20.1 days).
Average UV index in December
Coronado, CA
- Average UV index in December: 4
The months with the highest UV index are July, August and September (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
Coronado, CA
- Average cloud cover in December: 24
The months with the most cloud cover are March, May and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in December
Coronado, 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).
