My city averages less than 12 inches of rain a year, snow is almost unheard of.

"Snow has been recorded falling on San Diego communities only five times in over 125 years of record-keeping[3]. Snow flurries were last seen in San Diego on February 15th, 2008, and the last measurable snowfall to hit various neighborhoods and suburbs around the city fell on December 13th, 1967. In winter, light snow is common in mountainous regions of east San Diego County above 3000-4000 feet; one can sometimes see snow-covered mountains from San Diego. [4]"