San Diego Map, Quick Facts, and Weather
With its semi-arid climate, characterized by warm, dry summers and mild winters, San Diego is considered to have one of the top-ten overall best climates and one of the two best summer climates in America. The average year-round temperature is 70 °F (21 °C) with little precipitation, concentrated mostly between the months of December and March. The coldest month is January with an average temperature around 50 °F (10 °C). The city is primarily served by a light rail system called the San Diego Trolley, also known as simply “The Trolley” or by tourists as “The Red Trolley”. It’s comprised of 4 lines, plus an historic streetcar running exclusively during the holidays, and certain days of the week. The trolley is the 4th most-ridden light rail system in the nation.