São Paulo Sets December Heat Record at 35.9°C on Christmas Day

Overview

• The reading was taken at Inmet's Mirante de Santana station, the city's official reference site for temperature records.
• It surpassed the prior December maximum of 35.6°C set on December 3, 1998, and also stands as São Paulo's hottest day of 2025.
• The record fell twice in the afternoon, reaching 35.7°C at 3 p.m. before rising to 35.9°C at 4 p.m.
• Municipal monitoring logged a citywide station average of 35.6°C and a local peak of 38.8°C in Mooca.
• The broader region also baked, with Rio de Janeiro hitting 40.1°C at the Guaratiba station, according to the Alerta Rio system.