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
December, with its high-temperature average of 62.4°F (16.9°C) and a low-temperature average of 50.4°F (10.2°C), is the coldest month.Humidity
The average relative humidity in December in San Luis Rey, California, is 63%.Rainfall
The month with the most rainfall is December, when the rain falls for 6.8 days and typically aggregates up to 1.97" (50mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 10h and 0min of daylight.On the first day of December in San Luis Rey, sunrise is at 6:35 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 4:52 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.6h 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 in San Luis Rey. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In December, a daily UV index of 4 turns into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What is the coldest time of year in San Luis Rey?
What is the temperature in December in San Luis Rey?
What is the average humidity in December in San Luis Rey?
What is the rainiest month in San Luis Rey?
How many days does it rain in December in San Luis Rey?
What is the month with the shortest days in San Luis Rey?
What is the average length of the day in December in San Luis Rey?
When are sunrise and sunset in December in San Luis Rey?
What is the month with the least sunshine in San Luis Rey?
How many hours of sunshine does San Luis Rey have in December?
What is the month with the lowest UV index in San Luis Rey?
What is the UV index intensity in December in San Luis Rey?
Average temperature in December
San Luis Rey, CA
- Average high temperature in December: 62.4°F
The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in December: 50.4°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).
Average pressure in December
San Luis Rey, CA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in December
San Luis Rey, CA
- Average wind speed in December: 5.2mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in December
San Luis Rey, CA
- Average humidity in December: 63%
The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (60%).
Average rainfall in December
San Luis Rey, CA
- Average rainfall in December: 1.97"
The wettest month (with the highest rainfall) is December (1.97").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
San Luis Rey, CA
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is March (8 days).
The month with the least rainy days is June (2.7 days).
Average daylight in December /
Average sunshine in December
San Luis Rey, 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 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
San Luis Rey, CA
- Average sunshine days in December: 22.3 days
The month with the most sunshine days is October (24.2 days).
The month with the least sunshine days is February (20 days).
Average UV index in December
San Luis Rey, 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 Luis Rey, CA
- Average cloud cover in December: 25
The month with the most cloud cover is December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in December
San Luis Rey, 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 Luis Rey, California, USA
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