These winds are notorious for being hot, dry, and gusty, creating extreme fire danger by desiccating the chaparral and turning small sparks into conflagrations that can race across the landscape. In the desert fringes of Riverside and San Bernardino counties, summer temperatures routinely exceed 110°F (43°C).
Southern California Spring Weather: What to Expect
While the region enjoys a reputation for perpetual sunshine, the reality involves distinct seasonal shifts in temperature, precipitation, and humidity that vary dramatically from the coast to the inland valleys and high desert. These narrow corridors of concentrated moisture can dump several inches of rain in a single day, replenishing the reservoirs and filling the normally dry creek beds.
As this dense, cold air flows southwestward down the pressure gradients, it is forced through the mountain passes and canyons, accelerating dramatically and descending into the coastal communities. While Los Angeles International Airport might record a pleasant 75°F (24°C), areas in the San Fernando Valley, such as Woodland Hills, can easily hit 95°F (35°C) or higher.
Southern California Spring Weather and What to Expect
During the winter, this gradient reverses; coastal areas rarely drop below 50°F (10°C), while inland valleys can experience frost, and the high desert mountains occasionally receive significant snowfall that blankets the peaks for months. Seasonal Breakdown of Precipitation The wet season in Southern California is concentrated firmly in the winter months, running from November through March.
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