Question 1

What is the driest month in Brasília?

Accepted Answer

Brasília experiences its driest conditions during the months of May, June, and July, when the city receives virtually no rainfall. In 2024, all three months recorded 0.0mm of precipitation, making them equally the driest months of the year.

The Brazilian capital has a distinct tropical savanna climate with a pronounced dry season. From May through September 2024, Brasília received only 1.3mm (0.05 inches) of total precipitation—representing less than 0.1% of the annual rainfall. In stark contrast, the wettest month was January with 347.5mm of precipitation.

During the dry season, humidity drops significantly in Brasília. Average humidity falls from around 78% in the wet season to just 49.5% during the dry months. September 2024 saw the lowest humidity at 32.9%, despite temperatures warming to 24.6°C (76.3°F). The dry season average temperature was 21.2°C (70.1°F), making it pleasant for outdoor activities.

For visitors planning a trip to Brasília, the dry season from May to September offers clear skies and comfortable temperatures, though the low humidity can be noticeable. Those sensitive to dry air should stay hydrated and consider the dramatic difference from the wet season, when the city receives the bulk of its annual 1,967.8mm (77.5 inches) of rainfall.

Question 2

How much rain does Brasília get in January?

Accepted Answer

Brasília receives substantial rainfall in January, making it one of the wettest months of the year. In 2024, the city recorded 347.5 mm (13.7 inches) of precipitation during January alone, making it the rainiest month of the entire year.

January sits at the heart of Brasília's wet season, which runs from October through March. The 347.5 mm recorded in January 2024 represented approximately 17.7% of the city's total annual rainfall of 1,967.8 mm (77.5 inches). This heavy rainfall came with high humidity levels averaging 81.3% throughout the month.

Despite the frequent rain, temperatures in Brasília during January 2024 remained warm and pleasant. Average temperatures reached 21.9°C (71.4°F), with daily highs climbing to around 30.2°C (86.4°F) and nighttime lows staying mild at 17.1°C (62.8°F).

For visitors planning a trip to Brasília in January, expect afternoon thunderstorms as a near-daily occurrence. The rain typically falls in intense but brief bursts, leaving mornings and late afternoons clear for sightseeing. Pack waterproof gear and plan indoor activities during peak rainfall hours. The lush green landscapes created by the wet season offer a striking backdrop to the city's famous modernist architecture.

Question 3

What is the hottest month in Brasília?

Accepted Answer

September is the hottest month in Brasília, with an average temperature of 24.6°C (76.3°F) recorded in 2024. This makes it notably warmer than the annual average of 21.7°C (71.1°F) for the Brazilian capital.

During September 2024, Brasília experienced daily maximum temperatures reaching 34.8°C (94.6°F), while nighttime lows dropped to around 14.8°C. October follows closely as the second hottest month with an average of 23.5°C, and it actually recorded the highest peak temperature of the year at 35.6°C (96.1°F).

The hottest period in Brasília occurs during the transition from the dry season to the wet season, typically spanning September and October. This timing coincides with the end of winter in the Southern Hemisphere, when humidity levels are still relatively low but solar radiation intensifies. By contrast, June is the coolest month at 19.5°C average, creating only a 5.1°C variation between the warmest and coolest months—typical of Brasília's tropical savanna climate.

For visitors planning outdoor activities in Brasília, September and October can feel particularly intense due to the combination of heat and low humidity. Early mornings and late afternoons offer more comfortable conditions for sightseeing around the city's modernist architecture and open spaces.

Question 4

What is the sunniest time of year in Brasília?

Accepted Answer

Brasília enjoys its sunniest weather during the dry season from May to September, with July and September 2024 recording the highest sunshine at 322.4 hours each.

During the 2024 dry season, Brasília averaged 311.5 hours of sunshine per month, which is approximately 42% more than the wet season average of 219.5 hours. The three sunniest months were July (322.4 hours), September (322.4 hours), and August (321.8 hours), each providing over 10 hours of daily sunshine on average.

In contrast, the wet season months from October to April saw considerably less sunshine due to frequent afternoon thunderstorms. November 2024 was the least sunny month with only 190.5 hours of sunshine, while December recorded 207.9 hours. The total annual sunshine in Brasília reached 3,093.8 hours in 2024, averaging 257.8 hours per month across the year.

For visitors seeking sunny weather in Brasília, the period from May through September offers the most reliable conditions. July and August combine peak sunshine with mild temperatures around 19-21°C (66-70°F), making them ideal months for outdoor sightseeing and exploring the city's modernist architecture. September provides equally abundant sunshine with slightly warmer temperatures averaging 24.6°C (76°F), though the rainy season typically begins in October.

Question 5

What is the humidity like in Brasília throughout the year?

Accepted Answer

Brasília experiences dramatic humidity swings throughout the year, with average humidity ranging from a low of 32.9% in September to a high of 83.7% in November during 2024. This 50.8 percentage point variation is one of the most pronounced seasonal humidity shifts in Brazil.

The wet season from October to April brings comfortable humidity levels to Brasília, averaging 78.0%. During this period, six months recorded humidity above 75%: January at 81.3%, February at 79.5%, March at 81.0%, April at 76.4%, November at 83.7%, and December at 78.8%. These conditions feel tropical and support the lush green landscapes that characterize the region during the rainy season.

In stark contrast, the dry season from May to September sees humidity plunge to an average of just 49.5%. August and September are particularly notable, with humidity dropping to 43.1% and 32.9% respectively. These extremely dry conditions—comparable to desert climates—can cause discomfort including dry skin, irritated airways, and increased static electricity. Health authorities in Brasília often issue alerts during these months.

The annual average humidity in Brasília sits at 66.1%, but this figure masks the significant seasonal variation. Visitors planning trips should consider these humidity patterns: the wet season offers more comfortable moisture levels, while the dry season provides clear skies but requires extra hydration and skin care precautions.

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FAQ

What is the driest month in Brasília?

How much rain does Brasília get in January?

What is the hottest month in Brasília?

What is the sunniest time of year in Brasília?

What is the humidity like in Brasília throughout the year?