In this country for all seasons, November to March are the warmest and the most fun in the cities and all the beaches up and down its substantial coast. The Amazon tends to be wet at this time of year, but it is still a popular destination with great wildlife watching opportunities. The NE coast aslso sees a few showers, but they are mostly restricted to the afternoons. Book early if traveling around the February Carnival time.
Right from April to October sees Brazil enjoying cooler temperatures up and down the country. Wildlife comes alive in the Pantanal region and the massive cities of Rio and Sao Paulo see less congestion on the beaches. The Amazon is in flood at this time after its wet months, making river exploration fun and enriching.