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 sea temperature 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 brings an average high-temperature of a moderate 60.6°F (15.9°C), nearly identical to the preceding month. December nights reflect a consistent temperature dip to a still refreshing 56.5°F (13.6°C), a slight descent from daytime peaks.Humidity
The least humid month is December, with an average relative humidity of 68%.Rainfall
December is the month with the most rainfall. Rain falls for 6.8 days and accumulates 1.54" (39mm) of precipitation.Ocean temperature
In Avalon, in December, the average water temperature is 60.4°F (15.8°C).Note: Swimming in water at 60.4°F (15.8°C) is not a pleasing experience for the majority. As the temperature descends from 69.8°F (21°C) to 59°F (15°C), controlling breathing becomes increasingly hard.
Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 6:39 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:56 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.4h of sunshine.UV index
The months with the lowest UV index are January through May, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 4 transforms into these recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Avalon?
What is the least humid month?
What is the average humidity in December?
What is the rainiest month?
How much does it rain in December?
What is the ocean temperature 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 Avalon have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Avalon, CA
- Average high temperature in December: 60.6°F
The warmest month (with the highest average high temperature) is September (67.8°F).
The month with the lowest average high temperature is February (59.4°F).
- Average low temperature in December: 56.5°F
The month with the highest average low temperature is September (63.1°F).
The coldest month (with the lowest average low temperature) is March (54.9°F).
Average pressure in December
Avalon, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).
Average wind speed in December
Avalon, CA
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are June and July (6.8mph).
Average humidity in December
Avalon, CA
- Average humidity in December: 68%
The months with the highest relative humidity are June and July (86%).
The month with the lowest relative humidity is December (68%).
Average rainfall in December
Avalon, CA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
Avalon, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is September (4.7 days).
Average sea temperature in December
Avalon, CA
- Average sea temperature in December: 60.4°F
The best month for swimming (with the highest average sea temperature) is August (67.7°F).
The coldest months (with the lowest average sea temperature) are January and February (58.7°F).
Average daylight in December /
Average sunshine in December
Avalon, 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Avalon, CA
- Average sunshine days in December: 22.6 days
The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is June (19.6 days).
Average UV index in December
Avalon, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 4).
Average cloud cover in December
Avalon, CA
- Average cloud cover in December: 26
The month with the most cloud cover is June (Cloud cover 40).
The months with the least cloud cover are October and November (Cloud cover 21).
Average visibility in December
Avalon, 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).
Avalon, California, USA
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