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).
Winters are cold, with December the coolest month, with a mean temperature of 28.5 Â°F (â1.9 Â°C). Annual average snowfall is 21.7 inches (55.1 cm)., with most occurring in December and January, when the snow depth averages 2â3 inches. There are 22 days per year in which the high does not surpass freezing, and 2.3 nights where the low is 0 Â°F (â18 Â°C) or lower.