December weather forecastChannel Islands Beach, CA
December
Weather in December
The first month of the winter, December, is still a refreshing month in Channel Islands Beach, California, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 50.5°F (10.3°C).Temperature
As December commences, the average high-temperature subtly reduces, transitioning from an enjoyable 65.3°F (18.5°C) in November to a mild 59.9°F (15.5°C). December nights are marked by an average low-temperature of 50.5°F (10.3°C).Humidity
In December, the average relative humidity is 59%.Rainfall
In Channel Islands Beach, during December, the rain falls for 5.3 days and regularly aggregates up to 1.3" (33mm) of precipitation. Throughout the year, there are 46.5 rainfall days, and 8.31" (211mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 58.8°F (14.9°C).Note: Swimming in 58.8°F (14.9°C) feels unbearing at 55.4°F (13°C) and can be life-risking below 50°F (10°C), causing breathing issues and cold shock, depending on a person's capacity.
Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:45 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 4:57 pm PST.
Sunshine
In December, the average sunshine is 6.9h.UV index
The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A typical high UV index of 4 in December suggests the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Channel Islands Beach, CA
- Average high temperature in December: 59.9°F
The warmest months (with the highest average high temperature) are August and September (73.4°F).
The month with the lowest average high temperature is February (59°F).
- Average low temperature in December: 50.5°F
The month with the highest average low temperature is September (63°F).
The coldest months (with the lowest average low temperature) are February and December (50.5°F).
Average pressure in December
Channel Islands Beach, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).
Average wind speed in December
Channel Islands Beach, CA
- Average wind speed in December: 6.7mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Channel Islands Beach, CA
- Average humidity in December: 59%
The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (57%).
Average rainfall in December
Channel Islands Beach, CA
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is January (1.85").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Channel Islands Beach, CA
- Average rainfall days in December: 5.3 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is August (1.3 days).
Average sea temperature in December
Channel Islands Beach, CA
- Average sea temperature in December: 58.9°F
The best month for swimming (with the highest average sea temperature) is August (64.1°F).
The coldest month (with the lowest average sea temperature) is April (56.7°F).
Average daylight in December /
Average sunshine in December
Channel Islands Beach, CA
- Average daylight in December: 9h and 54min
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 54min
The months with the most sunshine are June, July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 48min).
Average sunshine days in December
Channel Islands Beach, CA
- Average sunshine days in December: 24.9 days
The month with the most sunshine days is October (27.2 days).
The month with the least sunshine days is February (21.7 days).
Average UV index in December
Channel Islands Beach, 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, April, November and December (UV index 4).
Average cloud cover in December
Channel Islands Beach, CA
- Average cloud cover in December: 21
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Channel Islands Beach, 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).
