The seasons are defined by flood and ebb. The Summer (wet) transforms the Pantanal into a vast flooded plain, while Winter (dry) is extremely dry, with relative humidity dropping below 20%. The Brazilian "winter" here is a desert-like season.
The only region with well-defined thermal seasons. Summer is hot (above 30°C), Autumn features foliage change (rare in Brazil), Winter brings frost, fog, and occasional snowfall (e.g., in São Joaquim). Spring is marked by severe thunderstorms and hail. season in brazil
| City | Summer (Dec-Feb) | Winter (Jun-Aug) | | :--- | :--- | :--- | | Manaus (Amazon) | Very hot, heavy rain | Warm, less rain | | Salvador (NE Coast) | Hot, humid | Warm, pleasant | | Brasília (Central) | Rainy, thunderstorms | Dry, cool nights | | São Paulo (SE) | Rainy, humid (22-28°C) | Dry, mild (12-20°C) | | Porto Alegre (South) | Hot, storms (22-32°C) | Cold, foggy (8-18°C) | The seasons are defined by flood and ebb
Unlike countries in the Northern Hemisphere, Brazil’s seasons are reversed: Summer occurs from December to March, and Winter from June to September. However, due to Brazil’s proximity to the Equator (92% of the country lies within the intertropical zone), seasonal temperature variation is often less significant than seasonal precipitation variation. This paper argues that rainfall seasonality , rather than thermal seasonality, is the primary driver of ecological, agricultural, and social rhythms in most of Brazil. The only region with well-defined thermal seasons
This densely populated region has a true tropical seasonality. Summer brings torrential, often catastrophic, rainfall (e.g., flooding in São Paulo). Winter (June-August) is mild (15-20°C) and dry, with the occasional passage of friagens (cold fronts from the South) dropping temperatures suddenly.