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The climate of California varies widely from hot desert to alpine tundra, depending on latitude, elevation, and proximity to the Pacific Coast. California 's coastal regions, the Sierra Nevada foothills, and much of the Central Valley have a Mediterranean climate , with warmer, drier weather in summer and cooler, wetter weather in winter.
In addition, climate change has impacted California's precipitation patterns in recent years with effects including more rapid snowmelt, more frequent heatwaves, and drier conditions across the state. [21] California precipitation and snowpack is measured by the state of California by "water year", which runs from October 1 to September 30. [22]
A 2011 study projected that the frequency and magnitude of both maximum and minimum temperatures would increase significantly as a result of global warming. [13] According to the Fifth National Climate Assessment published in 2023, coastal states including California, Florida, Louisiana, and Texas are experiencing "more significant storms and extreme swings in precipitation".
California is in desperate need of moisture in the form of rain and mountain snow. Since the water year began on Oct. 1, 2020, most areas are within the 25th to 50th percentile of average. Even ...
“There is also a risk of thunderstorms (10-20% chance), capable of producing small hail and isolated brief heavy downpours with rainfall rates up to 0.50 in/hr,” the weather service said in ...
El Niño and La Niña have often been associated with wet and dry cycles in California, respectively (the 1982–83 El Niño event, one of the strongest in history, brought record precipitation to the state), but recent climate data show mixed evidence for such a relationship due in part to the growing impact of human-induced global warming.
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San Diego Climate chart (explanation) J F M A M J J A S O N D 2 66 47 2.3 67 49 1.8 68 53 0.8 68 56 0.1 69 59 0.1 71 62 0 75 65 0 76 67 0.2 76 65 0.6 73 61 1 69 54 1.5 65 45 Average max. and min. temperatures in °F Precipitation totals in inches Source: NWS Metric conversion J F M A M J J A S O N D 50 19 8 58 19 10 46 20 12 20 20 13 3 20 15 1.8 22 17 0.8 24 19 0.5 24 19 3.8 24 18 14 23 16 26 ...