Note: Certification of an interlocutory decision by a trial court allows an appellate court to review the decision and to answer a controlling question of law. Certification is often used in state courts as well as federal courts and, where available, allows a federal court to refer a question of state law to the state's highest court. Certification is also used to refer to a judge's order that allows a suit to be maintained as a class action.
1 The average temperature in Santiago in December is somewhat warm at 19.2 Â°C (66.56 Â°F).  Afternoons can be very hot with average high temperatures reaching 28 Â°C (82.4 Â°F).
Climate and Weather in northern Chile. The climate in northern Chile is best described by looking at the Atacama Desert. Chileâs Atacama Desert is the driest place in the world with its average rainfall amounting to 1mm (0.04 inches) per year.he average high temperature during summer in Santiago is 20Â°C (68Â°F), while winter lows between June and July drop to 8Â°C (46Â°F). June and July are also the rainiest months in central Chile. This is the best time to go skiing in the Andes just a few hours from Santiago.