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
The lowest temperatures are recorded in December, with averages reaching a high of 62.8°F (17.1°C) and a low of 53.4°F (11.9°C).Humidity
In Surfside, the average relative humidity in December is 59%.Rainfall
December is the month with the most rainfall in Surfside. Rain falls for 6.6 days and accumulates 1.77" (45mm) of precipitation.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year in Surfside.On the first day of December, sunrise is at 6:39 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:54 pm PST.
Sunshine
With an average of 6.7h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index in Surfside are January through March, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 4 in December interprets into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Surfside?
What is the usual temperature for Surfside in December?
What is the average humidity in December in Surfside?
What is the rainiest month in Surfside?
How many days does it rain in December in Surfside?
What is the month with the shortest days in Surfside?
What is the average length of the day in December in Surfside?
When are sunrise and sunset in December in Surfside?
What is the month with the least sunshine in Surfside?
How many hours of sunshine does Surfside have in December?
What are the months with the lowest UV index in Surfside?
What is the UV index reading in December in Surfside?
Average temperature in December
Surfside, CA
- Average high temperature in December: 62.8°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (62.8°F).
- Average low temperature in December: 53.4°F
The month with the highest average low temperature is August (65.3°F).
The coldest month (with the lowest average low temperature) is February (52.7°F).
Average pressure in December
Surfside, CA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed in December
Surfside, CA
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest months (with the lowest average wind speed) are August, September and October (5.3mph).
Average humidity in December
Surfside, CA
- Average humidity in December: 59%
The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (57%).
Average rainfall in December
Surfside, CA
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Surfside, CA
- Average rainfall days in December: 6.6 days
The month with the highest number of rainy days is March (8.1 days).
The months with the least rainy days are June and August (2.3 days).
Average daylight in December /
Average sunshine in December
Surfside, CA
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Surfside, CA
- Average sunshine days in December: 22.7 days
The month with the most sunshine days is August (26.3 days).
The month with the least sunshine days is February (19.3 days).
Average UV index in December
Surfside, 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
Surfside, CA
- Average cloud cover in December: 23
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in December
Surfside, 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).
Surfside, California, USA
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