Warning: Heavy rain is expected in Paraná and Mato Grosso do Sul, along with low humidity in the interior of Brazil.

The presence of a low-pressure system off the coast of Paraguay continues to bring showers to parts of northern Rio Grande do Sul, western Santa Catarina, and especially Paraná. Rain may begin in the morning in western and northern Paraná, varying from moderate to heavy intensity. During the afternoon, these instabilities will spread across the northwest and north of the state, with a risk of lightning and winds up to 70 km/h. Eastern and coastal areas of the state will begin the week with clearer skies and medium cloud cover, but without rain. In Santa Catarina and northern Rio Grande do Sul, moisture circulation will stimulate localized showers during the morning and afternoon, weakening at night. In other regions, the weather will be clearer and more stable. Some cities in western Rio Grande do Sul and the Missões region may experience a more significant increase in temperature during the day.

In the Southeast, the week begins with a notable low humidity – the weather returns to being dry with an alert for relative humidity values between 20 and 12% between the north and northwest of São Paulo, the Triângulo Mineiro region, and the west and northwest of Minas Gerais. No rain is expected in the capitals of the region, and in São Paulo, it will get warmer during the afternoon. On the coast of Rio de Janeiro and Espírito Santo, moderate winds are possible with gusts of up to 50 km/h. In the afternoon, areas of western and southwestern São Paulo are under alert for moderate to heavy rain, due to the combination of heat and humidity.

In the Central-West region, instability persists in some areas of Mato Grosso do Sul, still quite irregular – but with a warning sign for moderate to heavy rain in areas of the south-central and southwest. Rain weakens in Mato Grosso, but is still present in areas of the extreme northwest of the state, varying between weak and moderate intensity. In other regions, the presence of dry air prevents rainfall, and relative humidity drops to levels below 12% in northern Goiás and parts of eastern Mato Grosso. No rain is expected in Cuiabá, Brasília, and Goiânia, with a notable rapid rise in temperatures.

In the Northeast, instability remains concentrated in a few coastal areas – isolated showers in eastern Sergipe and Alagoas – the week begins with muggy weather and caution in Maceió. In other regions, the weather remains stable with sunshine prevailing during the day. Temperatures should rise more between MA, PI, western and northern BA, the interior of PE and CE, while air humidity plummets in the afternoon – with values between 30 and 21%.

In the North, instability persists in Amazonas, Acre, Rondônia, and Roraima. There is a risk of some thunderstorms in northwestern Amazonas and heavy rain in Roraima, Acre, and northern Rondônia. In other regions, heavy showers are possible at times throughout the day. Pará may experience isolated showers in areas bordering Amazonas. Amapá and Tocantins will remain clear during the day, with sunshine interspersed with clouds and increasing heat as the hours pass – air humidity will reach emergency levels in southern Tocantins, with values below 12%.