Here is a quote about La Serena, On the edge of the Northern desert, it doesn't get much rain, though.
La Serena enjoys a transitional climate between the arid northern desert of the Atacama and the pleasant Mediterranean climate of the central coast. Clear skies and temperatures range between 15° Celsius (59º Fahrenheit) and 20° C. (68º F.) during the summer, with an average annual temperature of 14.7º C. (58.4º F.). July is the coldest winter month and February, in mid-summer is the warmest.
here is another link that talks about weather and climate
http://64.233.167.104/search?q=cache:cN ... =firefox-a


