Why is the saying "like cats and dogs"?

Why is the saying like cats and dogs? - briefly

The idiomatic expression "like cats and dogs" refers to heavy rainfall. It originates from the observation that cats and dogs often stay indoors during heavy downpours, thereby implying that even these animals avoid going out in such weather conditions. This phrase is commonly used to describe intense rain that makes outdoor activities uncomfortable or impractical.

Why is the saying like cats and dogs? - in detail

The idiomatic expression "like cats and dogs" refers to heavy rainfall, typically accompanied by strong winds. This vivid metaphor originates from the behavior of cats and dogs during inclement weather. Cats, known for their agility and independence, often seek shelter indoors when it rains heavily, while dogs, being more resilient and less averse to getting wet, may venture out into the rain. The contrasting behaviors of these two animals create an apt comparison for the intense and varied nature of heavy rainstorms. The saying has been used for centuries in English-speaking countries to describe not just the intensity of the rain but also the unpredictable and sometimes chaotic conditions that such weather can bring.