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).
Typical Weather in December. During December the temperatures in the Dominican Republic typically vary between a daily high of about 82.0 degrees and a daily low of approximately 71.0 degrees. On any given day during December in the Dominican Republic, you can expect early morning temperatures to be around 71.1 degrees. The temperature will rise over the course of the typical December day, reaching somewhere around 83.2 degrees by early afternoon.