December weather forecastLos Angeles, CA
December
Weather in December
The arrival of winter in Los Angeles, California, is evident in December, distinguished by colder temperatures, shorter daylight hours, and increased rainfall. A defining feature of December weather is an average rainfall becoming 1.54" (39mm), second only to February, bringing ample rain showers to the city. The month's temperature drops further to comply with winter characteristics, bidding farewell to the year's warmer months. Analytically, the days become shorter, and the UV index drops back to 4, making December truly seem like a winter month. Thus, December marks the arrival of the winter season, characterized by frequent rain showers and cooler temperatures, fittingly wrapping up the climatic cycle for the year.Temperature
Temperature records mark December as the coldest month, with highs averaging 64°F (17.8°C) and lows at 50°F (10°C).Humidity
In December, the average relative humidity is 54%.Rainfall
In Los Angeles, in December, it is raining for 5.8 days, with typically 1.54" (39mm) of accumulated precipitation. Throughout the year, there are 44.6 rainfall days, and 8.11" (206mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:40 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 4:54 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 6.7h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 4 in December leads to these guidelines:
Ensure safety - Sun damage prevention is strongly urged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar 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
Los Angeles, CA
- Average high temperature in December: 64°F
The warmest month (with the highest average high temperature) is August (83.3°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in December: 50°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (49.8°F).
Average pressure in December
Los Angeles, 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
Los Angeles, CA
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is October (4.5mph).
Average humidity in December
Los Angeles, CA
- Average humidity in December: 54%
The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (50%).
Average rainfall in December
Los Angeles, CA
- Average rainfall in December: 1.54"
The wettest month (with the highest rainfall) is February (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in December
Los Angeles, CA
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is March (6.9 days).
The month with the least rainy days is June (1 days).
Average daylight in December /
Average sunshine in December
Los Angeles, 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 42min
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 42min).
Average sunshine days in December
Los Angeles, CA
- Average sunshine days in December: 23.8 days
The month with the most sunshine days is August (28.1 days).
The month with the least sunshine days is February (21.7 days).
Average UV index in December
Los Angeles, CA
- Average UV index in December: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in December
Los Angeles, CA
- Average cloud cover in December: 22
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in December
Los Angeles, 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).
