Arica, Chile holds the record for the longest dry streak ever. Arica went 173 months (14 years) without a single drop of rain back in the early 1900s. The annual average amount of rain for a city close to Arica is .07". Tucson is in a desert, but we average over 11" of rain a year. About 160 times more rain a year than Antofagasta, Chile.