The 10 all-time hottest weather temperature days in the history of Los Angeles dating back to 1877, plus the all-time hottest weather temperature ever recorded in California.
These are the ten all-time hottest weather temperature days recorded in the city of Los Angeles, California. The temperature data for Downtown Los Angeles dates back to 1877. As anybody who lives in the city, or who has visited here knows, LA can get pretty hot.
The hottest temperature ever recorded in Los Angeles, California is 113 degrees, which occurred on September 27, 2010. The hottest temperature ever recorded in the state of California is 134 degrees, which occurred on July 10, 1913 in Death Valley. That is also the hottest temperature ever recorded in the United States, and in North America.
One hundred degree weather days are not uncommon in Los Angeles. There have been 100 degree weather days in LA in every month from April through November. The earliest date that a 100 degree weather day occurred in Los Angeles in any year dating back to 1877 is April 4th. That latest date that a 100 degree temperature day occurred in any year is November 1st.
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10 All-Time Hottest Weather Temperature Days in Los Angeles
1. September 27, 2010 - 113 degrees
2. June 26, 1990 - 112 degrees
T-3. September 4, 1988 - 110 degrees
T-3. September 1, 1955 - 110 degrees
T-5. June 27, 1990 - 109 degrees
T-5. September 26, 1963 - 109 degrees
T-5. July 25, 1891 - 109 degrees
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T-8. October 4, 1987 - 108 degrees
T-8. October 3, 1987 - 108 degrees
T-8. September 2, 1955 - 108 degrees
It has been 108 degrees in Los Angeles many other times; just the last three dates are listed above.
The hottest month of the year in Los Angeles is August, which has an average daily mean temperature of 75.3 degrees, followed closely by July with an average daily mean temperature of 74.4 degrees. The next hottest month is September at 74.1 degrees, followed by June at 70.3 degrees.
The Weather of Los Angeles
The Los Angeles area is a vast are actually ranging from valley, to the city center to the pacific coast. This wide range can and usually does produce a wide range of daily temperatures.
The Los Angeles area contains what are called microclimates; in fact the area contains many different microclimates. These microclimates can cause the temperature to vary by as much 36 F between the inland areas like the San Fernando Valley and the costal areas.
Summers are warm to very hot, and usually dry, until the monsoon season starts. The monsoon in the southwest United States usually starts in July and can continue into the early fall. During the monsoon season, Los Angeles can get intense thunderstorms with rains, strong winds and a lot of lightening.
Changes in temperature are caused by several factors. When there is an onshore breeze off of the Pacific Ocean, temperatures can be rather mild as inland as downtown Los Angeles, but not necessarily into the valley areas.
Hot weather is many times accompanied by Santa Ana winds. These strong winds are offshore winds, blowing from east to west. These winds can cause the temperatures to soar in the Los Angeles area and sometimes fan forest fires.
2017 was a hot summer for Los Angeles. In late October 2017, Southern California had some of the hottest temperatures in the United States on record for so late in the year. Both Marine Corps Air Station Miramar, 15 miles northeast of San Diego recorded a high of 108 F as did San Luis Obispo, which is northwest of Los Angeles on the coast. These temperature readings were verified by the National Weather Service. Downtown Los Angeles recorded a high of 104 F.
That evening, the hottest postseason game in Major League Baseball history was played. The first-pitch temperature for Game 1 of the World Series at Dodger Stadium was a blistering 103 degrees.
For more see How Often Does the Sun Shine in Los Angeles?