Brazil's Carnival Monday (February 16) is expected to be hot across major cities, including São Paulo and Rio de Janeiro, with isolated showers expected in the afternoon. The weather in São Paulo will start with few clouds in the morning, but temperatures will rise, reaching a high of 32°C, potentially peaking at 34°C, with humidity levels between 40% and 95%. Despite the rain, it is not expected to significantly disrupt the street festival activities.

In Rio de Janeiro, temperatures are predicted to soar even higher, with a maximum of 36°C and a minimum of 21°C. Similar to São Paulo, afternoon and evening showers are expected, but the warmth is anticipated to persist throughout Carnival festivities. Meanwhile, Belo Horizonte is also in for isolated showers in the afternoon, though it is forecasted to clear up by evening.

Overall, the Southeast region of Brazil will experience predominantly sunny and hot conditions. Late afternoon showers may occur, yet they are not anticipated to hinder the vibrant celebrations typical of Carnival. The combination of high temperatures and humidity highlights the tropical climate of Brazil, particularly during the summer season coinciding with the Carnival period.