Source 2: UV Index Today (1995 to 2022) Ĭlimate data for Los Angeles ( LAX), 1991–2020 normals, extremes 1944–present Ĭlimate data for Los Angeles ( USC, Downtown), 1991–2020 normals, extremes 1877–present Warm winter temperatures give the city subtropical characteristics. The average highs range from the upper 60's F to lower 70's F (17-21 C) with cooler overnight lows in the upper 40's and lower 50's F (8-12 C). While there is a great increase in rainfall in the winter months, the winter months in Los Angeles are still frequently sunny and pleasant with mild -to-warm temperatures. The normal seasonal rainfall measured at downtown Los Angeles is 14.77 inches, of which 92% falls between November 1 and April 30. Precipitation episodes in Los Angeles, with a few notable exceptions, are largely caused by extratropical disturbances approaching California from the west or northwest during the winter season. The winter wet season normally runs from November through April. During this season, there is essentially no rainfall, and both July and August average less than 0.05 of an inch (1.27 mm) of monthly precipitation. Average high temperatures are in the lower 80's F (26-28 C) with overnight lows in the lower 60's F (15-17 C). The summer dry season normally runs from May through October, when clear skies, hot temperatures, and very little change in sensible weather occur from day to day. While the typical dry-summer and wet-winter pattern typical of most Mediterranean climates is part of the climate of Los Angeles, precipitation annually is lower than in many typical Mediterranean climates, giving it semi-arid characteristics. Los Angeles has a hot-summer Mediterranean climate ( Köppen Csa), with hot, dry summers, and mild-to-warm winters, with increased precipitation. The primary weather station for Los Angeles is located near downtown at the University of Southern California campus, and this article refers primarily to climate data generated by this station as representative of the Los Angeles metropolitan area as a whole. The two northernmost cities in Los Angeles County, Palmdale and Lancaster, frequently receive snow in the winter due to their altitude of approximately 2,500 feet (760 m), while their summers are hotter than the rest of the county.Ĭlassifications Los Angeles Climate according to major climate systems The Los Angeles area contains microclimates, where daytime temperatures can vary as much as 36 ☏ (20 ☌) between inland areas such as the San Fernando Valley or San Gabriel Valley, and the coastal Los Angeles Basin. Under the modified Köppen climate classification, the coastal areas are classified as Csb, and the inland areas as Csa. It is characterized by seasonal changes in rainfall-with a dry summer and a winter rainy season. It is classified as a Mediterranean climate, which is a type of dry subtropical climate. The climate of Los Angeles is mild to hot year-round, and mostly dry. Downtown Los Angeles on a typically sunny day, but with unusual atmospheric clarity.
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