Inmet: weather forecast between August 19th and 25th, 2025

The National Institute of Meteorology (Inmet) predicts a week marked by climatic contrasts in the country between August 19 and 25, 2025. While areas of the North and South Regions are expected to record significant volumes of rain, which may exceed 70 millimeters in some places, the Center-West, Southeast and the interior of the Northeast will have predominantly dry weather, with low relative humidity, reaching levels below 30% in several locations.

Na Northern Region, areas of instability are expected to be concentrated in Roraima, as well as in the northwest and central portions of Amazonas, with volumes that could exceed 30 mm. The highest rainfall accumulations are forecast for the central part of Amazonas, potentially exceeding 70 mm. In contrast, in the south-central regions of Rondônia, southern Amazonas and Pará, eastern Acre and Tocantins, no rain is forecast throughout the week. In these areas, relative humidity is expected to decrease, potentially reaching levels below 30%.

Inside the Northeast Region, No rain is forecast. Relative humidity will decrease, especially in central Piauí and western Bahia, where values will be below 30%. In small areas of the northeastern coast, rainfall amounts will remain below 10 mm. However, on Tuesday (August 19), rainfall above 8 mm may occur on the coast of the states of Alagoas and Sergipe. On the northern coast of the northeast region, winds may intensify.

Na Midwest region, the forecast is for stable weather in virtually all states. The exception is southwestern Mato Grosso do Sul, where rainfall accumulations exceeding 20 mm are possible, accompanied by winds above 60 km/h and possible hail between today and tomorrow (August 20). Furthermore, relative humidity is expected to remain below 8% throughout virtually the entire region in the coming days, with the greatest intensity in the state of Goiás and east-central Mato Grosso.

The forecast for the Southeast The weather is expected to be mostly stable, with no rain. However, light rain may occur early in the week in some areas of southern São Paulo, central and northeastern Rio de Janeiro, and the coast of Espírito Santo. Winds are forecast to intensify in the coastal regions of the states of São Paulo and Rio de Janeiro between today and tomorrow (August 20). Relative humidity below 8% is expected for the coming days in the Triângulo Mineiro, southern and southwestern Minas Gerais, and central, northern, and western São Paulo.

For South, rainfall accumulations of between 20 and 50 mm are forecast for south-central Rio Grande do Sul, central Santa Catarina, and southwestern Paraná. Due to the activity of an extratropical cyclone, moderate to heavy rain showers are expected in the coming days, which may be accompanied by wind gusts above 50 km/h, with possible hail, starting today (August 19). Significant rainfall volumes are forecast for north-central Rio Grande do Sul, as well as western and southern Santa Catarina, which may exceed 8 mm. Strong winds are also forecast for the coastal regions of the states of Rio Grande do Sul and Santa Catarina.