In "East of Eden," John Steinbeck eloquently illustrates the cyclical nature of California's rainfall. He describes a pattern that repeats every thirty years, starting with a period characterized by abundant rainfall, leading to a flourishing landscape filled with grass and vitality. This phase is marked by five to six years with notable precipitation, reaching up to 25 inches, creating a vibrant environment.

Following this lush period, Steinbeck notes a transition to six to seven years of relatively good rain, allowing for decent growth but not to the extent of the previous years. Eventually, the cycle culminates in a series of dry years, indicating how the climate can drastically shift from abundance to scarcity, showcasing the unpredictable nature of the region's weather patterns.