December weather forecastDana Point, CA
December
Weather in December
December, the first month of the winter in Dana Point, is still a refreshing month, with an average temperature fluctuating between 51.6°F (10.9°C) and 61.9°F (16.6°C).Temperature
With average temperatures fluctuating between a high of 61.9°F (16.6°C) and a low of 51.6°F (10.9°C), December stands out as the coldest month.Humidity
In December, the average relative humidity is 63%.Rainfall
December is the month with the most rainfall in Dana Point. Rain falls for 6.8 days and accumulates 1.93" (49mm) of precipitation.Ocean temperature
In Dana Point, California, the average seawater temperature in December is 60.4°F (15.8°C).Note: Swimming in water at 60.4°F (15.8°C) is not a pleasurable experience for most. The task of managing breathing becomes more challenging as the water temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Dana Point.On the first day of the month, sunrise is at 6:37 am and sunset at 4:42 pm. On the last day of December, in Dana Point, California, sunrise is at 6:54 am and sunset at 4:53 pm PST.
Sunshine
With an average of 6.4h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 4 in December translates into the following instructions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dana Point, CA
- Average high temperature in December: 61.9°F
The warmest month (with the highest average high temperature) is September (75.7°F).
The month with the lowest average high temperature is December (61.9°F).
- Average low temperature in December: 51.6°F
The month with the highest average low temperature is September (63.5°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).
Average pressure in December
Dana Point, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in December
Dana Point, CA
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is October (5.1mph).
Average humidity in December
Dana Point, CA
- Average humidity in December: 63%
The month with the highest relative humidity is June (76%).
The month with the lowest relative humidity is November (61%).
Average rainfall in December
Dana Point, CA
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is December (1.93").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
Dana Point, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (3.6 days).
Average sea temperature in December
Dana Point, CA
- Average sea temperature in December: 60.3°F
The best month for swimming (with the highest average sea temperature) is August (68.3°F).
The coldest months (with the lowest average sea temperature) are January and February (58.9°F).
Average daylight in December /
Average sunshine in December
Dana Point, 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 24min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Dana Point, CA
- Average sunshine days in December: 22.9 days
The month with the most sunshine days is January (24.1 days).
The month with the least sunshine days is February (20.3 days).
Average UV index in December
Dana Point, 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
Dana Point, CA
- Average cloud cover in December: 26
The months with the most cloud cover are March and May (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in December
Dana Point, 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).
