Escondido is one of the oldest cities in San Diego County, in the great state of California. The city is about 30 miles north of San Diego and about 100 miles south of Los Angeles. Average temperatures in this sunny city range from highs of nearly ninety degrees in the summer to lows of around forty degrees in the winter. The mild weather is great for gardening; citrus and avocado trees thrive here. Good to know: Escondido also called the Best Place in the West to Retire by Money Magazine.