This report describes the typical weather at the La Civic Center (Los Angeles, California, United States) weather station over the course of an average January. It is based on the historical records from 1999 to 2012. Earlier records are either unavailable or unreliable.
Los Angeles, California has a mediterranean climate with dry warm summers and mild winters. The area within 25 mi of this station is covered by built-up areas (47%), oceans and seas (22%), shrublands (17%), and forests (13%).
The month of January is characterized by essentially constant daily high temperatures, with daily highs around 68°F throughout the month, exceeding 78°F or dropping below 59°F only one day in ten.
Over the course of January, the length of the day is gradually increasing. The shortest day of the month is January 1 with 9:56 hours of daylight; the longest day is January 31 with 10:31 hours of daylight.
The earliest sunrise is at 6:51am on January 30; the latest sunset is at 5:22pm on January 31; the latest sunrise is at 7:00am on January 7; the earliest sunset is at 4:55pm on January 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in January, so the entire month is in standard time.
The median cloud cover ranges from 3% (clear) to 8% (clear).
On January 16, a representative day, the sky is clear or mostly clear 59% of the time, partly cloudy 1% of the time, and mostly cloudy or overcast 18% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around January 28, occurring in 22% of days. Precipitation is least likely around January 9, occurring in 18% of days.
Throughout January, the most common forms of precipitation are light rain, heavy rain, and moderate rain.
Light rain is the most severe precipitation observed during 38% of those days with precipitation. It is most likely around January 28, when it is observed during 8% of all days.
Heavy rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around January 24, when it is observed during 7% of all days.
Moderate rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around January 29, when it is observed during 7% of all days.
Either snow is exceptionally unlikely to fall at this location in January or this station does not reliably report precipitation types.
The relative humidity typically ranges from 33% (comfortable) to 82% (humid) over the course of a typical January, rarely dropping below 13% (very dry) and reaching as high as 97% (very humid).
The air is driest around January 11, at which time the relative humidity drops below 48% (comfortable) three days out of four; it is most humid around January 30, rising above 74% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical January, the dew point typically varies from 32°F (dry) to 48°F (dry) and is rarely below 17°F (dry) or above 54°F (very comfortable).
Over the course of January typical wind speeds vary from 0 mph to 6 mph (calm to light breeze), rarely exceeding 9 mph (gentle breeze).
The highest average wind speed of 2 mph (light air) occurs around January 28, at which time the average daily maximum wind speed is 6 mph (light breeze).
The lowest average wind speed of 1 mph (light air) occurs around January 7, at which time the average daily maximum wind speed is 6 mph (light breeze).