A new cold front is moving across Brazil, bringing rain and isolated thunderstorms to several regions starting Thursday, May 7, 2026 [1].

The shift in weather follows a week of sunny and hot conditions. This transition is significant for the South, Southeast, and Center-West regions, where the atmospheric instability may disrupt travel and daily activities through the weekend.

The Instituto Nacional de Meteorologia (INMET) reported that the cold air mass is associated with areas of instability that typically generate rain as they move northward. "A new cold front associated with areas of instability should influence weather conditions in much of Brazil starting this Thursday (7)," INMET said [1].

Impacts are expected to peak on Saturday, May 9, and Sunday, May 10, 2026 [1]. An INMET specialist said that starting Saturday there will be a change in the state with the advance of a new cold front, which will bring heavy rain, isolated storms, and gusts of wind [2].

The weather system will affect five states [2], including São Paulo, Espírito Santo, Minas Gerais, Paraná, and Santa Catarina. A meteorologist from Folha Vitória said the drop in temperatures is expected to happen in the Southeast and Center-West regions, bringing colder weather and scattered rains [3].

There are conflicting reports regarding the volume of the rainfall. While some reports describe the rains as intense across a large part of the country [1], other forecasts indicate that the volumes of the predicted storms should not be high [4].

“A new cold front is moving across Brazil, bringing rain and isolated thunderstorms.”

The arrival of this cold front marks a seasonal transition for Brazil's southern and central regions. The contrast between the preceding heatwave and the incoming instability can increase the likelihood of severe thunderstorms and wind gusts, necessitating vigilance from local authorities regarding urban flooding and infrastructure stability in the affected states.