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 February 18. 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%).
The temperature typically varies from 52°F to 63°F and is rarely below 46°F or above 72°F.
The coolest hours of the day are from 2am to 8am with the coldest at 6am, at which time the temperature is below 55°F three days out of four.
The warmest hours of the day are from 10am to 4pm with the hottest at noon, at which time the temperature is above 59°F three days out of four.
The day has gained half its heat by 10am and lost it again by 8pm.
On February 18 the Sun rises at 6:35am and sets at 5:40pm.
Solar noon is at 12:07pm.
For reference, on the longest day of the year the Sun rises at 5:42am and sets at 8:07pm, while on the shortest day of the year it rises at 6:55am and sets at 4:48pm.
Astronomical twilight begins and ends 83 minutes before sunrise and after sunset at 5:12am and 7:03pm, respectively.
Nautical twilight begins and ends 54 minutes before sunrise and after sunset at 5:40am and 6:34pm, respectively.
Civil twilight begins and ends 25 minutes before sunrise and after sunset at 6:10am and 6:05pm, respectively.
Solar twilight begins and ends 34 minutes after sunrise and before sunset at 7:09am and 5:05pm, respectively.
The median cloud cover ranges from 47% (partly cloudy) to 66% (partly cloudy).
At midnight, the clearest time of the day, the sky is clear, mostly clear, or partly cloudy 62% of the time, and overcast or mostly cloudy 38% of the time.
At 9am, the cloudiest time of the day, the sky is overcast, mostly cloudy, or partly cloudy 63% of the time, and clear or mostly clear 37% of the time.
The sky is typically clearing in earnest by 6pm.
The clouds have typically started forming in earnest by 5am.
There is a 28% chance that precipitation will be observed at some point during the day.
The average measured liquid-equivalent quantity of precipitation is 0.113". Among only those days for which there is at least some measured precipitation, the average is 0.478" and the total rarely exceeds 1.114".
When precipitation does occur it is most often in the form of moderate rain (45% of days with precipitation have at worst moderate rain), slight rain (32%), heavy rain (11%), and thunderstorms (8%).
Precipitation is most likely around 6am and least likely around 4pm.
Either snow is exceptionally unlikely to fall at this location on February 18 or this station does not reliably report precipitation types.
The relative humidity typically ranges from 58% (mildly humid) to 76% (humid), rarely dropping below 28% (dry), or exceeding 96% (very humid).
The air is driest at noon, at which time the relative humidity is less than 74% (humid) three days out of four; it is most humid at 4am, exceeding 66% (mildly humid) three days out of four.
The dew point ranges from 43°F to 48°F with an average of 46°F.
For reference, comfortable indoor conditions should have a relative humidity between 30% and 50% with a dew point of less than 65°F.
Sustained wind speeds typically vary from 5 mph to 12 mph (light breeze to moderate breeze) over the course of the day.
The peak sustained wind speed typically occurs around 3pm and is rarely outside the range 8 mph to 17 mph (gentle breeze to moderate breeze).
The wind is most calm around 5am, rarely exceeding 10 mph (gentle breeze).
The wind is most often out of the west (28% of the time), east (20% of the time), and south west (12% of the time). The wind is least often out of the south (4% of the time) and north west (4% of the time).