What does the words mean it pours man it pours in it never rains in southern California?

Answer 1

What the song means is that in Southern California, it simply does not rain lightly and gently like it does in Europe, eastern North America, Canada, Japan or New Zealand.

Compared to those humid regions, and even to many arid regions of the Eastern Hemisphere, rainfall is very infrequent in Southern California. Los Angeles receives rain on an average of only thirty-six days per year (one in ten) and this is very typical of the whole region including much wetter high elevation stations that can accumulate as much as 40 inches (1 metre) total precipitation in an average year.

However, maximum daily rainfalls in Southern California during its rainy season from November to March are among the highest in the US. At sea level, daily falls of 3 inches will occur once a year in Santa Barbara, and 2.5 inches a day once a year in Los Angeles, whilst at high elevations daily falls of six inches (150 millimetres) rainfall equivalent (snow at high elevations) will occur on average every year. In fact, in the mountains above Los Angeles 22 January 1943 saw a daily fall of 26.12 inches at Hoegees Camp at 2750 feet or 840 metres altitude - then the heaviest daily rainfall anywhere in the United States, in a place that gets only 32 inches of rain in an average year. "It pours" refers to this capacity for extremely heavy rainfall over short periods when the tips of fronts interact with tropical moisture colloquially known as the "pineapple express".