Which month does California typically receive the most precipitation?

• A. August
• B. October
• C. December
• D. March

Answer: (B)

California typically receives the most precipitation in December. During this month, the state experiences the peak of its rainy season, particularly in the coastal and mountainous regions. The combination of storm systems that develop over the Pacific Ocean, often associated with the subtropical jet stream, brings significant moisture that falls as rain in many areas.

While other months, such as October and March, can also see precipitation as part of the transitional periods between seasons, they generally do not reach the precipitation levels that December does. October may experience some early fall rains, while March captures late winter moisture; however, December is characterized by a more consistent and heavier rainfall pattern that is crucial for the region’s water supply and recovery from the dry summer months.