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 January 25. 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 51°F to 64°F and is rarely below 45°F or above 74°F.
The coolest hours of the day are from 2am to 8am with the coldest at 6am, at which time the temperature is below 54°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 January 25 the Sun rises at 6:55am and sets at 5:16pm.
Solar noon is at 12:06pm.
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 87 minutes before sunrise and after sunset at 5:28am and 6:43pm, respectively.
Nautical twilight begins and ends 56 minutes before sunrise and after sunset at 5:58am and 6:13pm, respectively.
Civil twilight begins and ends 26 minutes before sunrise and after sunset at 6:28am and 5:43pm, respectively.
Solar twilight begins and ends 36 minutes after sunrise and before sunset at 7:31am and 4:40pm, respectively.
The median cloud cover ranges from 43% (partly cloudy) to 63% (partly cloudy).
At midnight, the clearest time of the day, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 36% of the time.
At noon, the cloudiest time of the day, the sky is overcast, mostly cloudy, or partly cloudy 62% of the time, and clear or mostly clear 38% of the time.
The sky is typically clearing in earnest by 7pm.
The clouds have typically started forming in earnest by 6am.
There is a 27% chance that precipitation will be observed at some point during the day.
The average measured liquid-equivalent quantity of precipitation is 0.072". Among only those days for which there is at least some measured precipitation, the average is 0.385" and the total rarely exceeds 0.788".
When precipitation does occur it is most often in the form of moderate rain (47% of days with precipitation have at worst moderate rain), slight rain (30%), heavy rain (13%), and thunderstorms (5%).
Precipitation is most likely around 6am and least likely around 9pm.
Either snow is exceptionally unlikely to fall at this location on January 25 or this station does not reliably report precipitation types.
The relative humidity typically ranges from 55% (mildly humid) to 73% (humid), rarely dropping below 23% (dry), or exceeding 97% (very humid).
The air is driest at noon, at which time the relative humidity is less than 73% (humid) three days out of four; it is most humid at 4am, exceeding 58% (mildly humid) three days out of four.
The dew point ranges from 40°F to 47°F with an average of 43°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 11 mph (light breeze to gentle breeze) over the course of the day.
The peak sustained wind speed typically occurs around 3pm and is rarely outside the range 7 mph to 15 mph (light breeze to moderate breeze).
The wind is most calm around 4am, rarely exceeding 8 mph (gentle breeze).
The wind is most often out of the west (23% of the time) and east (22% of the time). The wind is least often out of the south (4% of the time) and north west (4% of the time).