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Average Weather For Los Angeles, California, USA

Location

This report describes the typical weather at the La Civic Center (Los Angeles, California, United States) weather station over the course of an average year. 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%).

Temperature

Over the course of a year, the temperature typically varies from 48°F to 83°F and is rarely below 43°F or above 91°F.

Daily High and Low Temperature

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

The warm season lasts from July 2 to September 25 with an average daily high temperature above 80°F. The hottest day of the year is August 27, with an average high of 83°F and low of 65°F.

The cold season lasts from November 29 to March 17 with an average daily high temperature below 69°F. The coldest day of the year is December 23, with an average low of 48°F and high of 66°F.

Fraction of Time Spent in Various Temperature Bands

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).
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March 2017
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April 2017
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May 2017
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June 2017
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July 2017
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August 2017
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September 2017
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January 2018
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Sun

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 14:26 hours of daylight.

Daily Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

The earliest sunrise is at 5:41am on June 10 and the latest sunset is at 8:09pm on July 1. The latest sunrise is at 7:15am on November 2 and the earliest sunset is at 4:43pm on December 4.

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.

Daily Sunrise & Sunset with Twilight and Daylight Savings Time

The solar day over the course of the year 2012 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight savings time are indicated by the "DST" labels.

Clouds

The median cloud cover ranges from 3% (clear) to 34% (mostly clear). The sky is cloudiest on June 1 and clearest on December 21. The clearer part of the year begins around July 19. The cloudier part of the year begins around May 3.

Median Cloud Cover

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

On December 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 62% of the time, and overcast or mostly cloudy 17% of the time.

On June 1, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 32% of the time, and clear or mostly clear 47% of the time.

Cloud Cover Types

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around February 20, occurring in 23% of days. Precipitation is least likely around July 22, occurring in 1% of days.

Probability of Precipitation at Some Point in the Day

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

Over the entire year, the most common forms of precipitation are light rain, heavy rain, and moderate rain.

Light rain is the most severe precipitation observed during 49% of those days with precipitation. It is most likely around March 5, when it is observed during 10% of all days.

Heavy rain is the most severe precipitation observed during 25% 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 25% of those days with precipitation. It is most likely around February 20, when it is observed during 7% of all days.

Types of Precipitation Throughout the Year

Relative frequency of various types of precipitation over the course of a typical year.

During the warm season, which lasts from July 2 to September 25, there is a 2% 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 light rain (80% of days with precipitation have at worst light rain) and heavy rain (12%).

During the cold season, which lasts from November 29 to March 17, there is a 20% 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 light rain (42% of days with precipitation have at worst light rain), heavy rain (30%), and moderate rain (28%).

Warm Season Precipitation

Cold Season Precipitation

Relative frequency of various types of precipitation during the warm and cold seasons respectively.

Snow

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.

Humidity

The relative humidity typically ranges from 31% (comfortable) to 87% (very humid) over the course of the year, rarely dropping below 12% (very dry) and reaching as high as 98% (very humid).

The air is driest around December 1, at which time the relative humidity drops below 43% (comfortable) three days out of four; it is most humid around August 2, exceeding 82% (humid) three days out of four.

Relative Humidity

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

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 30°F (dry) to 63°F (mildy humid) and is rarely below 15°F (dry) or above 67°F (muggy).

The time of the year between March 12 and November 19 is the most comfortable, with dew points that are neither too dry nor too muggy.

Dew Point

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

Over the course of the year typical wind speeds vary from 0 mph to 8 mph (calm to gentle breeze), rarely exceeding 11 mph (gentle breeze).

The highest average wind speed of 3 mph (light air) occurs around April 11, at which time the average daily maximum wind speed is 8 mph (gentle breeze).

The lowest average wind speed of 1 mph (light air) occurs around November 22, at which time the average daily maximum wind speed is 6 mph (light breeze).

Wind Speed

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind direction is highly variable and is not predominantly from any single direction.The wind is least often out of the south (0% of the time), north east (1% of the time), north west (1% of the time), north (1% of the time), south east (1% of the time), south west (2% of the time), and east (3% of the time).

Wind Directions Over the Entire Year

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.