Rio Records 2026 Low Temperatures After Mid‑July Cold Front

Overview

• Inmet and the municipal Sistema Alerta Rio reported new 2026 minima on Thursday, with Inmet recording 10.5°C at Vila Militar and Alerta Rio 11.0°C at Alto da Boa Vista.
• Inmet noted very low readings in nearby municipalities early that morning, including 9.6°C in Xerém (Duque de Caxias) and 10.4°C in Seropédica.
• Forecasters trace the episode to a cold front that passed on July 12 followed by a drop in overnight cloud cover, which let surface heat escape and drove sharper nighttime cooling.
• Models show the cold spell will be brief, with a high‑pressure ridge expected to lift daytime temperatures into the mid‑20s Celsius and to produce strong coastal gusts of 50–70 km/h in towns such as Cabo Frio, Búzios and Arraial do Cabo.
• Differences between agency reports reflect station location and observation time, a variation that matters for residents and services planning for sudden temperature swings and strong coastal winds.