Weather in Brasília

Brasília is in Brazil at 15.8°S. The 2001–2020 NASA POWER daily record describes a monsoon climate with a sharp wet-dry split. Rain is the monsoon runs from October to April, inside an annual total of 1303 mm. The wettest month is December at 221 mm; the driest is July at 2 mm.

October is the warmest month (average 25.6°C, high 31.9°C) and June is the coolest (average 20.5°C, low 13.6°C). From the coolest night in June (13.5°C) to the hottest afternoon in October (32.8°C), the raw range is 19.3°C. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are June, July, and August.

Best months to visit Brasília

The three months with the highest comfort score are June, July, and August: June (20.5°C average, 5 mm, 66% humidity); July (20.9°C average, 2 mm, 54% humidity); August (22.9°C average, 11 mm, 44% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the monsoon itself — fewer crowds, greener landscape, heavier rain — aim at October–April instead of the score.

Hot and cool months in Brasília

The heat peaks in October, when the typical afternoon is 31.9°C. The opposite pole is June, when mornings average 13.6°C.

Mean high across all twelve months is 28.4°C and mean low is 17.0°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

Rainfall pattern

The monsoon in Brasília starts in October and ends in April (October, November, December, January, February, March, and April). December is the core of it at 221 mm. July is the other extreme, with 2 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. December averages 25 such days; July averages 0.

The calendar in Brasília

By April the monsoon is ending. Brasília still sees about 107 mm, but the next month is usually leaner. In May, Brasília averages 26.8°C by day and 14.9°C at night, with 25 mm of rain. The year bottoms out in June. Plan for 13.6°C at night and 27.3°C in the afternoon. July is the driest month, averaging only 2 mm across 0 rainy days. Highs sit near 28.4°C.

October is when the monsoon typically starts in Brasília: highs near 31.9°C, and rainfall jumps to 113 mm (17 rainy days). November: 28.4°C high, 18.8°C low, 200 mm rain, 76% humidity. December is the wettest month — 221 mm and 25 rainy days, with 80% humidity.

How Brasília compares inside Brazil

Goiânia is about 173 km away: Brasília is 1.2°C cooler than Goiânia in its hottest month and 95 mm drier over the year than Goiânia. Goiânia’s wettest month is January (239 mm) versus December here.

Belo Horizonte is about 625 km away: Brasília is 2.7°C warmer than Belo Horizonte in its hottest month and 93 mm wetter over the year than Belo Horizonte. Belo Horizonte’s wettest month is December (266 mm) versus December here.

Guarulhos is about 867 km away: Brasília is 2.2°C warmer than Guarulhos in its hottest month and 76 mm drier over the year than Guarulhos. Guarulhos’s wettest month is January (228 mm) versus December here.