This report describes the typical weather at the Los Angeles International Airport (Los Angeles, California, United States) weather station over the course of an average year. It is based on the historical records from 1974 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 oceans and seas (43%), built-up areas (40%), shrublands (11%), and forests (5%).
Over the course of a year, the temperature typically varies from 49Â°F to 76Â°F and is rarely below 43Â°F or above 83Â°F.
The warm season lasts from July 1 to October 8 with an average daily high temperature above 73Â°F. The hottest day of the year is August 29, with an average high of 76Â°F and low of 65Â°F.
The cold season lasts from December 8 to April 15 with an average daily high temperature below 66Â°F. The coldest day of the year is December 23, with an average low of 49Â°F and high of 65Â°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:54 hours of daylight; the longest day is June 20 with 14:25 hours of daylight.
The earliest sunrise is at 5:42am on June 11 and the latest sunset is at 8:09pm on June 30. The latest sunrise is at 7:15am on November 3 and the earliest sunset is at 4:44pm on December 5.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 36% (mostly clear) to 60% (partly cloudy). The sky is cloudiest on June 11 and clearest on November 26. The clearer part of the year begins around August 9. The cloudier part of the year begins around January 12.
On November 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.
On June 11, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 57% of the time, and clear or mostly clear 42% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around February 27, occurring in 28% of days. Precipitation is least likely around August 3, occurring in 7% of days.
Over the entire year, the most common forms of precipitation are moderate rain, light rain, and drizzle.
Moderate rain is the most severe precipitation observed during 41% of those days with precipitation. It is most likely around January 28, when it is observed during 13% of all days.
Light rain is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around March 8, when it is observed during 9% of all days.
Drizzle is the most severe precipitation observed during 10% of those days with precipitation. It is most likely around May 28, when it is observed during 4% of all days.
During the warm season, which lasts from July 1 to October 8, there is a 9% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (37% of days with precipitation have at worst moderate rain), light rain (25%), drizzle (19%), and thunderstorms (12%).
During the cold season, which lasts from December 8 to April 15, there is a 25% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (44% of days with precipitation have at worst moderate rain), light rain (34%), heavy rain (11%), and thunderstorms (6%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 38% (comfortable) to 90% (very humid) over the course of the year, rarely dropping below 13% (very dry) and reaching as high as 100% (very humid).
The air is driest around December 6, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around July 31, exceeding 86% (very 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 year, the dew point typically varies from 32Â°F (dry) to 63Â°F (mildy humid) and is rarely below 16Â°F (dry) or above 67Â°F (muggy).
The time of the year between January 13 and December 14 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of the year typical wind speeds vary from 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around April 16, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around January 4, at which time the average daily maximum wind speed is 12 mph (gentle breeze).