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
San Juan Capistrano's temperature records reveal December as the coldest month, marked by average highs of 62.4°F (16.9°C) and lows of 50.5°F (10.3°C).Humidity
In San Juan Capistrano, California, the average relative humidity in December is 62%.Rainfall
December is the month with the most rainfall in San Juan Capistrano, California. Rain falls for 6.8 days and accumulates 1.85" (47mm) of precipitation.Daylight
December has the shortest days of the year in San Juan Capistrano, with an average of 10h and 0min of daylight.On the first day of December, sunrise is at 6:37 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:53 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 6.4h 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 estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 4 transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What part of the year is the coldest in San Juan Capistrano?
What is the temperature in December in San Juan Capistrano?
What is the average humidity in December in San Juan Capistrano?
What is the wettest month in San Juan Capistrano?
How much does it rain in San Juan Capistrano in December?
What is the month with the shortest days in San Juan Capistrano?
How many hours of daylight does San Juan Capistrano have in December?
When are sunrise and sunset in December in San Juan Capistrano?
What is the month with the least sunshine in San Juan Capistrano?
How long on average sun shines in December in San Juan Capistrano?
What is the month with the lowest UV index in San Juan Capistrano?
What is the UV index reading in December in San Juan Capistrano?
Average temperature in December
San Juan Capistrano, CA
- Average high temperature in December: 62.4°F
The warmest month (with the highest average high temperature) is September (77.4°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in December: 50.5°F
The month with the highest average low temperature is August (63.3°F).
The coldest month (with the lowest average low temperature) is February (50°F).
Average pressure in December
San Juan Capistrano, 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 June (29.88"Hg).
Average wind speed in December
San Juan Capistrano, CA
- Average wind speed in December: 5.4mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (5mph).
Average humidity in December
San Juan Capistrano, CA
- Average humidity in December: 62%
The month with the highest relative humidity is June (74%).
The month with the lowest relative humidity is November (59%).
Average rainfall in December
San Juan Capistrano, CA
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
San Juan Capistrano, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (3 days).
Average daylight in December /
Average sunshine in December
San Juan Capistrano, 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: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
San Juan Capistrano, CA
- Average sunshine days in December: 22.8 days
The month with the most sunshine days is January (24.7 days).
The month with the least sunshine days is May (19.5 days).
Average UV index in December
San Juan Capistrano, 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
San Juan Capistrano, CA
- Average cloud cover in December: 26
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 11).
Average visibility in December
San Juan Capistrano, 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).
San Juan Capistrano, California, USA
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