Boa Vista Climate & Monthly Temperature Overview – Brazil
Climate and Average Weather Year Round
Boa Vista, the capital of the Brazilian state of Roraima, experiences a tropical savanna climate with two distinct seasons: a rainy season from December to May and a dry season from June to November. During the rainy season, heavy rainfall is common, with an average monthly precipitation of over 200 millimeters. Temperatures remain relatively stable throughout the year, with an average daily high of 32 degrees Celsius (90 degrees Fahrenheit) and an average daily low of 22 degrees Celsius (72 degrees Fahrenheit).
The dry season is characterized by significantly less rainfall, with average monthly precipitation below 100 millimeters. Temperatures during this period tend to be slightly cooler, with an average daily high of 30 degrees Celsius (86 degrees Fahrenheit) and an average daily low of 18 degrees Celsius (64 degrees Fahrenheit). However, despite the reduced rainfall, humidity levels remain high throughout the year, making the climate feel warm and humid even during the drier months.
Monthly Average Temperatures
Boa Vista, the capital of the Brazilian state of Roraima, experiences a tropical savanna climate, characterized by two distinct seasons: a wet season from December to April and a dry season from May to November.
During the wet season, Boa Vista experiences heavy rainfall and high humidity, leading to average temperatures ranging from 27°C (80.6°F) to 33°C (91.4°F). December and January are the hottest months, with average temperatures reaching up to 35°C (95°F).
Seasonal Temperature Variations
In the dry season, rainfall is minimal, and humidity drops significantly. As a result, average temperatures are lower, ranging from 24°C (75.2°F) to 30°C (86°F). July is the coolest month, with average temperatures dipping below 24°C (75.2°F) at night.
Overall, Boa Vista has a relatively warm climate throughout the year, with average temperatures never falling below 24°C (75.2°F) even during the coolest months. The wet season is characterized by high humidity and heavy rainfall, while the dry season is drier and cooler.
Cloud Cover and Precipitation
Boa Vista, the capital of Roraima, Brazil, experiences high cloud cover throughout the year. Cloud types observed include cirrus, cumulus, and stratus clouds. The average annual cloud cover is over 70%, with higher values during the rainy season (December to April) and lower values during the dry season (June to November). The high cloud cover influences the amount of sunlight reaching the ground, affecting temperatures and humidity levels.
During the rainy season, convective clouds, such as cumulonimbus, dominate the skies, leading to frequent thunderstorms and heavy rainfall. The average annual precipitation in Boa Vista exceeds 1,500 mm, with most precipitation occurring during the rainy season. The heavy precipitation supports lush vegetation and tropical forests in the region. During the dry season, cloud cover decreases, and precipitation becomes less frequent and less intense, resulting in more sunshine and drier conditions.
Seasonal Patterns
Boa Vista, Brazil, experiences a distinct wet and dry season. The wet season typically runs from November to April, bringing heavy rainfall and frequent thunderstorms. During this period, the average monthly precipitation exceeds 200 millimeters (8 inches). In contrast, the dry season extends from May to October and is characterized by minimal rainfall, with average monthly precipitation often below 50 millimeters (2 inches).
Annual Variability
The annual rainfall in Boa Vista exhibits significant variability. While the average annual precipitation is approximately 1,400 millimeters (55 inches), deviations from this average are common. In wet years, the city can receive over 2,000 millimeters (80 inches) of rain, while in dry years, precipitation may fall below 1,000 millimeters (40 inches). This variability is largely influenced by fluctuations in the Amazon rainforest’s moisture availability and the El Niño-Southern Oscillation (ENSO) cycle, which can affect rainfall patterns in the region.
Rainfall Patterns
Boa Vista, the capital of the Brazilian state of Roraima, experiences a tropical savanna climate with distinct wet and dry seasons. During the wet season, from December to April, heavy rainfall is common, with an average of 100-150 millimeters of rain falling each month. The rainy season is characterized by frequent thunderstorms and periods of persistent drizzle.
Temporal Distribution
The temporal distribution of rainfall within the year is highly variable. During the dry season, from May to November, precipitation is scarce, with average monthly rainfall below 50 millimeters. However, during the wet season, rainfall can be both intense and prolonged. Extreme rainfall events, with daily totals exceeding 100 millimeters, are not uncommon. These heavy rains can lead to flooding and other infrastructure damage, particularly in low-lying areas.
History of Snowfall in Boa Vista
Boa Vista, the capital of the Brazilian state of Roraima, is located in the northernmost part of the country, near the equator. Despite its tropical climate, snowfall has occurred in Boa Vista on two recorded occasions. The first snowfall was reported on July 10, 1964, during an unseasonably cold front. The snowfall was light and lasted for only a few minutes, but it was enough to cause widespread excitement and amazement among the local residents. The second snowfall occurred in 2010, but details about this event are scarce.
Causes of Snowfall in Boa Vista
The occurrence of snowfall in Boa Vista is a rare and unusual phenomenon, as the city is located in a tropical climate zone. However, under certain circumstances, it is possible for snow to form in Boa Vista. One of the key factors is the presence of a strong cold front. When a cold front passes through the region, it can bring with it cold and dry air, which can cause temperatures to drop significantly. Additionally, the presence of moisture in the air can also contribute to the formation of snow. If the temperature is low enough and there is sufficient moisture in the air, snow can form. The snowfall in Boa Vista occurs at high altitudes, typically on the Serra do Tepequém mountains.
Sunrise and Sunset Times in Boa Vista, Brazil
Boa Vista, the capital of Roraima state in northern Brazil, experiences varied sunrise and sunset times throughout the year due to its proximity to the equator. During the summer months (January to March), the sun rises around 5:30 AM and sets around 6:30 PM, providing approximately 12.5 hours of daylight. In the winter months (June to August), the sunrise is slightly later around 6:00 AM, and the sunset is earlier around 5:30 PM, resulting in approximately 11.5 hours of daylight. The city’s position near the equator ensures that the days are consistently long throughout the year, with only minor variations in daylight hours.
Seasonal Variations in Boa Vista’s Sun
Boa Vista experiences distinct seasonal variations in sunshine duration and intensity. During the rainy season, which typically lasts from December to April, the city receives abundant rainfall, leading to increased cloud cover and reduced sunshine. As a result, the sun’s intensity is lower during this period, and the average daily sunshine duration is around 5-6 hours. Conversely, during the dry season (May to November), Boa Vista enjoys clear skies and minimal rainfall, resulting in longer hours of sunshine and increased solar intensity. The average daily sunshine duration during the dry season is around 8-9 hours, providing ample opportunities for outdoor activities and sunbathing.
Moon Phases in Boa Vista, Brazil
Boa Vista, the capital of Roraima state in northern Brazil, experiences a distinct pattern of moon phases throughout the year. The city lies close to the equator, resulting in relatively constant day and night lengths. As such, the moon’s appearance and position in the sky remain fairly consistent.
During a new moon, when the moon is between the Earth and the Sun, it is not visible from Boa Vista. As the moon waxes (grows), it becomes visible as a thin crescent in the western sky after sunset. Over the following days, the crescent moon continues to grow and rise higher in the sky, eventually reaching its first quarter phase. At this point, half of the moon is illuminated and visible. The moon continues to wax, becoming a gibbous moon, and eventually reaching its full phase, when the entire face of the moon is illuminated.
Monthly Humidity Variations
Boa Vista, located in northern Brazil, experiences significant humidity variations throughout the year. During the rainy season, which typically spans from December to April, the average relative humidity can reach up to 90%, creating a muggy and uncomfortable atmosphere. The high moisture content in the air is attributed to the increased rainfall and atmospheric convection during this period. In contrast, the dry season, from May to September, brings drier conditions with relative humidity levels dropping to around 60-70%. The lack of precipitation and the predominant trade winds contribute to lower humidity during these months.
Diurnal Humidity Patterns
Boa Vista also exhibits diurnal humidity patterns, characterized by higher humidity levels in the morning and lower levels in the afternoon. As the sun rises, the air temperature increases, leading to higher evaporation rates and an increase in humidity. This is particularly evident during the rainy season when morning humidity levels can reach up to 95%. As the day progresses and the sun reaches its zenith, the air becomes drier due to increased evaporation and solar heating. In the late afternoon and evening, the humidity levels start to rise again as the temperature begins to cool. This diurnal pattern creates a cycle of alternating humidity levels, with higher values during the early hours and lower values in the midday and late afternoon.
Wind Speeds and Patterns
Boa Vista, Brazil experiences a consistent easterly wind flow throughout the year. During the rainy season (December to May), the average wind speed ranges from 10 to 15 knots (18 to 28 km/h), providing a steady and refreshing breeze. During the dry season (June to November), wind speeds decrease slightly to an average of 8-12 knots (15-22 km/h). These gentle winds contribute to the city’s pleasant tropical climate.
Impact on Weather and Climate
The consistent easterly winds play a significant role in shaping Boa Vista’s weather patterns. The winds transport moisture from the Atlantic Ocean, which contributes to the city’s wet summers and dry winters. During the dry season, strong trade winds from the northeast can occasionally generate dust storms, particularly in the surrounding savanna regions. Overall, the prevailing easterly winds moderate Boa Vista’s temperatures, creating an atmosphere that is generally warm and humid year-round.
Rainy Season (October to May)
The rainy season in Boa Vista typically lasts from October to May, bringing heavy rainfall and humid conditions. Temperatures during this time range from 25°C to 35°C, with occasional thunderstorms and strong winds. While the lush greenery and fresh air can be appealing, the high humidity and frequent downpours may make it uncomfortable for some travelers. However, the reduced tourist crowds and lower accommodation rates can be advantageous for those willing to brave the elements.
Dry Season (June to September)
The dry season in Boa Vista lasts from June to September, characterized by clear skies, low humidity, and sporadic rainfall. Temperatures during this period typically range from 20°C to 30°C, making it an ideal time for outdoor activities. The lack of rain ensures excellent visibility for sightseeing and hiking, while the cooler nights provide respite from the daytime heat. The city comes alive during the dry season, with festivals, cultural events, and a vibrant nightlife scene. It is also the peak tourist season, so expect higher prices and larger crowds.
Solar Energy Potential in Boa Vista
Boa Vista, the capital city of Roraima, Brazil, possesses remarkable solar energy potential. The region boasts one of the highest solar irradiance levels in the country, averaging over 2,000 kilowatt-hours per square meter (kWh/m2) annually. This plentiful sunlight presents an opportunity for significant solar energy generation, which can contribute to reducing the city’s reliance on fossil fuels and promote sustainable development.
Solar Energy Development Initiatives
Recognizing the potential of solar energy, the government of Boa Vista has implemented several initiatives to promote its development. In 2017, the city inaugurated a 2.5-megawatt (MW) photovoltaic (PV) plant, the largest in northern Brazil at the time. The plant generates approximately 4.2 gigawatt-hours (GWh) of electricity annually, offsetting carbon emissions by an estimated 2,300 tons. Furthermore, the city has established incentive programs for the installation of residential and commercial solar PV systems, encouraging the adoption of renewable energy solutions by its citizens and businesses.
General Topography
Boa Vista, the capital of Roraima state in northern Brazil, lies on the undulating Guianan Shield, an ancient geological formation that encompasses much of northern South America. The city’s topography is characterized by a series of rolling hills, known as chapadas, interspersed with sparse forests and open grasslands. The Rio Branco, a major tributary of the Amazon River, meanders through the city, creating fertile floodplains and oxbow lakes. The highest point within the city limits is approximately 250 meters above sea level, while the lowest point is around 100 meters.
Boa Vista Plateau
The city of Boa Vista is situated on the Boa Vista Plateau, a prominent geological feature that rises abruptly from the surrounding lowlands. The plateau forms a broad, flat-topped mesa, gently sloping towards the south. It is primarily composed of sandstone and laterite, which give the plateau its distinctive reddish-brown hue. The plateau’s edge marks a significant topographic boundary, with steep escarpments dropping down to the lower-lying areas. The plateau’s elevation, combined with its well-drained soils, has made it a prime location for agriculture and urban development, including the city of Boa Vista.
Boa Vista International Airport (BVB)
Boa Vista International Airport (IATA: BVB, ICAO: SBBV) is the main airport serving the city of Boa Vista, the capital and largest city of the state of Roraima, Brazil. It is located about 4 km (2.5 mi) northwest of the city center. The airport has one asphalt runway that is 2,200 m (7,200 ft) long and 45 m (148 ft) wide. It is capable of handling aircraft up to the size of the Boeing 737.
The airport is served by several airlines, including Azul Brazilian Airlines, Gol Transportes Aéreos, and LATAM Brasil. These airlines offer flights to major cities in Brazil, such as Brasília, Manaus, and São Paulo. The airport also has international flights to Georgetown, Guyana, and Paramaribo, Suriname.
Other Airports Near Boa Vista
In addition to Boa Vista International Airport, there are several other airports located within a short distance of the city. These airports include:
- Caracaraí Airport (CCR): Located about 120 km (75 mi) southwest of Boa Vista, Caracaraí Airport is a small airport that is primarily used for general aviation.
- São João da Baliza Airport (JDB): Located about 150 km (93 mi) southeast of Boa Vista, São João da Baliza Airport is a small airport that is also used primarily for general aviation.
- Bonfim Airport (BFB): Located about 300 km (186 mi) southeast of Boa Vista, Bonfim Airport is a small airport that is used by the Brazilian Air Force.
City Profile
Boa Vista, the capital city of the state of Roraima in Brazil, is a vibrant and bustling metropolis situated on the banks of the Branco River. With a population of approximately 420,000, it is the most populous city in Roraima and serves as the economic and administrative hub of the region. Boa Vista is home to a diverse population, including indigenous communities, migrants from neighboring states, and settlers from other parts of Brazil. The city boasts a rich cultural tapestry influenced by its indigenous, Amazonian, and Brazilian heritage.
Economic Activities
Boa Vista’s economy is primarily driven by government services and commerce, with a significant contribution from the cattle ranching industry. The city is also a gateway to the Amazon rainforest, providing access to tourism, logging, and mining activities. One of the major economic developments in Boa Vista has been the discovery of oil and gas reserves in the region. The city has witnessed increased investment in the energy sector, contributing to its economic growth and job creation. Boa Vista continues to strive towards economic diversification, with efforts to develop industries such as agriculture, manufacturing, and technology.