A arrival of a cold front changes the weather over the weekend in the city of São Paulo, causing rain in the form of showers and moderate gusts of wind.
The expectation is that Saturday (20) start the day with sun and rising temperatures. “The weather changes between the afternoon and the evening, when the spread of a cold front causes rain showers that should vary from light to moderate intensity, with lightning and gusts of wind that can exceed 40 kilometers per hour”, estimates the Climate Emergency Management Center (CGE) of the City of São Paulo.
On Sunday (21), still light rain and drizzle occur during the early hours of the morning, but the weather improves and the sun returns between clouds throughout the day.
Temperatures should vary between minimum of 13°C and maximum of around 24°Cwhile humidity levels rise again and must remain above 50%. The expectation is that the change in weather conditions will pave the way for the arrival of the first most significant cold wave of the season in the following days.
Beginning of winter
The first cold wave of winter 2026 should start advancing through Brazil this weekendprecisely on the days that mark the transition between the seasons. THE Winter starts on Sunday and should arrive accompanied by the passage of a cold front that begins to act over the Center-South of the country.
According to Climatempo, the system should cause increased instability on Friday, with rain forecast in areas of Rio Grande do Sul, Santa Catarina, Paraná and Mato Grosso do Sul. Throughout the day, the precipitation gains strength and spreads across these regionswhile winds intensify and temperatures begin to drop, especially at night.
The arrival of cold front occurs in a winter that tends to present atypical characteristics in several Brazilian regions due to the rapid strengthening of the El Niño phenomenon, which officially began in the first week of June. According to Climatempo, the phenomenon should influence temperature and rainfall patterns throughout the season.
