The Arizona resident who correctly guesses the first day thermometers in the state hit 100 could be cooling off at a luxury resort’s pool.

The Sheet Metal and Air Conditioning Contractors’ National Association’s Arizona chapter is again sponsoring its 100-Degree Contest, offering the public a chance to win a two-night stay at the Four Seasons Resort near Scottsdale, Ariz., for guessing the date the official temperature at Phoenix Sky Harbor International Airport reaches 100°F.

In 2007, it was April 28.

SMACNA-AZ’s executive director, Carol Goguen, said the contest is a fun way to get the public ready for the desert’s hot summer months and teach them about the association and its member contractors.

Contestants can enter Only one entry per person, per day is accepted.