Vilhena Climate & Monthly Temperature Overview – Brazil

Climate and Average Weather Year Round in Vilhena, Brazil

Vilhena, Brazil, experiences a tropical savanna climate, characterized by distinct wet and dry seasons. The wet season, which runs from October to April, brings abundant rainfall and warm temperatures. During this period, average daily temperatures range from 23°C (73°F) to 33°C (91°F), with humidity levels typically exceeding 80%. December and January are the rainiest months, with an average of over 200mm of precipitation each.

In contrast, the dry season, from May to September, is characterized by significantly less rainfall and humidity. Temperatures during this time are still warm, but noticeably cooler than in the wet season. Average daily temperatures range from 18°C (64°F) to 29°C (84°F), with humidity levels dropping to around 60%. June and July are the driest months, with an average of less than 50mm of precipitation each. Overall, Vilhena’s climate is warm throughout the year, with plenty of sunshine and a refreshing breeze during the drier months.

Best Time to Visit Vilhena, Brazil

Based on the climate and weather conditions, the best time to visit Vilhena is during the dry season, from May to September. During this time, there is less rainfall and humidity, making it more comfortable for outdoor activities and sightseeing. The cooler temperatures of the dry season also provide a welcome respite from the intense heat of the wet season.

Climate and Temperature Trends

Vilhena, Brazil, experiences a tropical savanna climate with distinct wet and dry seasons. The average annual temperature in Vilhena is a warm 27.3°C (81.14°F). The hottest months are October and November, with average temperatures hovering around 29°C (84.2°F). During the coldest months, June and July, temperatures typically range from 22°C to 24°C (71.6°F to 75.2°F).

Temperature Variation and Rainfall Patterns

The temperature in Vilhena exhibits significant variation throughout the year. During the wet season, which spans from October to April, heavy rainfall can cause temperatures to fluctuate and humidity levels to rise. In contrast, the dry season, from May to September, is characterized by drier conditions and more stable temperatures. The average annual rainfall in Vilhena is approximately 1,420 millimeters (55.9 inches), with most of the precipitation occurring during the wet season.

High Clouds in Vilhena, Brazil

Vilhena, Brazil, experiences high cirrus clouds throughout the year, with an average cover of 5-15%. These clouds are located at altitudes between 6,000 to 18,000 meters and are composed of ice crystals. They are often thin and wispy, with a silky or fibrous appearance. Cirrus clouds typically indicate fair weather, but they can sometimes produce halos or sundogs around the sun when the ice crystals align.

Low Clouds in Vilhena, Brazil

Low clouds in Vilhena include stratus, stratocumulus, and cumulus clouds. Stratus clouds are flat, gray layers that cover the entire sky and often produce drizzle or light rain. Stratocumulus clouds are gray or white masses with a lumpy appearance, while cumulus clouds are puffy clouds that resemble cotton balls. These low clouds typically form at altitudes below 2,000 meters and can indicate precipitation or impending storms. However, they can also form in clear weather as a result of local convection currents.

Annual Precipitation Patterns

Vilhena, located in the Brazilian state of Rondônia, experiences a tropical savanna climate with distinct wet and dry seasons. The annual precipitation in Vilhena is around 1,500 mm (59 in), with most of the rain falling between October and April. During these months, heavy rainfall is common, often accompanied by thunderstorms and occasional flooding. The wet season is crucial for agriculture, as it provides ample moisture for crops and vegetation.

Seasonal Variations and Extremes

The dry season in Vilhena typically lasts from May to September, during which time precipitation is minimal. However, occasional showers may occur, providing some relief from the extended dry spell. The lack of significant rainfall during this period can lead to drought conditions, affecting water availability and causing challenges for agriculture. Extremes in precipitation can also occur, with occasional years experiencing unusually heavy rainfall or prolonged droughts. These fluctuations can have significant impacts on the local economy and the well-being of the population.

Rainfall Patterns

Vilhena, Brazil, experiences a monsoon-like climate, characterized by distinct wet and dry seasons. The rainy season typically spans from October to April, while the dry season lasts from May to September. During the rainy season, Vilhena receives an average of 1,500 millimeters of rainfall, with particularly heavy rainfall occurring in December and January. The average annual rainfall in Vilhena is approximately 1,900 millimeters, making it one of the wettest cities in Brazil.

Impacts of Rainfall

The heavy rainfall during the rainy season can have significant impacts on Vilhena and its surroundings. Flooding is a common occurrence, especially in low-lying areas and along rivers. The intense rainfall can also lead to mudslides and erosion, causing damage to infrastructure and homes. However, the abundant rainfall during the wet season supports the growth of lush vegetation and agriculture in the region. Farmers rely on this rainfall for cultivating crops such as soybeans, corn, and rice, which are essential to the local economy.

Snowfall in Vilhena, Brazil: A Rare Occurrence

The city of Vilhena, located in the northwestern Brazilian state of Rondônia, experienced a rare snowfall on July 21, 2021. It was the first time in recorded history that snow had fallen in the city. The snowfall occurred during a cold front that brought unseasonably low temperatures to the region, with the temperature dropping to below zero degrees Celsius. Residents were taken by surprise as they witnessed the unusual sight of snow covering the streets, cars, and trees. Social media was flooded with images and videos of the snowy scenes, as people shared their amazement and excitement.

Impact of the Snowfall

The snowfall in Vilhena had a significant impact on the city. Schools and businesses were closed, as the slippery roads and sidewalks made it unsafe for people to travel. Many residents spent the day indoors, enjoying the novelty of the snow. However, the snowfall also caused some minor problems, such as power outages and water leaks in homes. The city government worked quickly to clear the roads and restore essential services, ensuring that the situation returned to normal within a few days. The snowfall in Vilhena was a reminder of the unpredictable nature of weather and the beauty that can be found in even the most unexpected moments.

Sunrise and Sunset

In Vilhena, Brazil, the sun rises and sets at different times throughout the year due to the Earth’s orbit around the Sun and the tilt of its axis. The earliest sunrise occurs around 5:10 AM in December, while the latest sunrise happens around 6:40 AM in June. Similarly, the earliest sunset takes place around 5:40 PM in December, and the latest sunset occurs around 7:05 PM in June. The duration of daylight varies significantly throughout the year, with the longest days occurring in December and the shortest days in June.

Sunlight Hours and UV Index

The amount of sunlight hours in Vilhena varies depending on the season and time of day. The city receives the most sunlight during the summer months (December to February), with an average of 11-12 hours of daylight per day. In contrast, the winter months (June to August) have the least amount of sunlight, with an average of only 8-9 hours of daylight per day. The UV index in Vilhena is generally moderate to high throughout the year, with the highest levels occurring during the summer months. It is important to take precautions when exposed to the sun, such as wearing sunscreen, sunglasses, and protective clothing.

Moon Rise and Set Times:

The moon in Vilhena, Brazil, experiences varying rise and set times throughout the month. During a new moon, the moon is not visible as it aligns with the sun. As the moon progresses through its phases, its rise and set times gradually shift. Full moon typically occurs around the 15th of each month, during which time the moon is visible all night. The specific rise and set times for the moon in Vilhena can be found through astronomical calendars or online moon phase calculators.

Moon Phases:

The moon goes through a cycle of phases as it orbits Earth. These phases are determined by the moon’s position relative to the sun and Earth. The four primary phases are new moon, waxing crescent, waxing gibbous, full moon, waning gibbous, waning crescent, and back to new moon. Each phase lasts approximately 7 days, and the entire cycle takes about 29.5 days to complete. The different moon phases have varying effects on tides, wildlife, and even human behavior, according to certain beliefs and folklore.

Seasonal Variation

Vilhena experiences distinct seasonal variability in humidity levels. During the wet season (October to May), the city faces high humidity, often exceeding 80%. This period is characterized by frequent rainfall and overcast skies, leading to a saturated atmosphere. The high humidity levels can make it challenging to engage in outdoor activities comfortably. However, during the dry season (June to September), humidity levels drop significantly, averaging around 50-60%. The drier climate allows for more comfortable outdoor activities and reduces the risk of respiratory issues.

Daily Variation

Daily humidity patterns in Vilhena are also notable. In the morning, humidity levels tend to be at their highest, often exceeding 90%. As the day progresses, the humidity decreases slightly, reaching its lowest point during the late afternoon or evening hours. This daily variation in humidity is primarily due to the combined effects of solar radiation and wind speed. The strong sunlight during the morning hours evaporates moisture from the soil and vegetation, increasing atmospheric moisture. As the sun sets and winds pick up speed, the moisture is dispersed, leading to lower humidity levels in the evening.

Wind Patterns and Seasonality

Vilhena, Brazil experiences a humid subtropical climate, characterized by abundant rainfall and distinct seasons. The prevailing wind direction in Vilhena is from the southeast, known as the trade winds, which are consistent throughout the year. During the rainy season (October to April), these winds bring moisture from the Atlantic Ocean, leading to heavy downpours. In the dry season (May to September), the trade winds become stronger and drier, reducing humidity and rainfall.

Wind Speed and Variability

The average wind speed in Vilhena varies between 8 and 12 kilometers per hour (5-7 miles per hour). However, the wind speed can fluctuate significantly depending on the season and weather conditions. During the rainy season, wind speeds tend to be lower due to increased cloud cover and rainfall. In contrast, during the dry season, winds can reach speeds of up to 20 kilometers per hour (12 miles per hour) as the skies clear and the air becomes drier. Gusts of wind can occur occasionally, particularly during storms or thunderstorms.

Best Time to Visit for Weather

Vilhena, Brazil, boasts a tropical climate characterized by high temperatures and ample rainfall throughout the year. However, the best time to visit Vilhena from a weather perspective is during the dry season, which runs from May to September. During these months, the city experiences less precipitation and more sunshine, making it ideal for outdoor activities and exploration. The average temperature during the dry season ranges from 22°C to 32°C, with humidity levels dropping to a comfortable level.

Best Time to Visit for Events

Vilhena hosts a variety of events and festivals throughout the year that offer unique cultural experiences. The most popular event is the Vilhena Rodeo, which takes place in August. This week-long event features traditional rodeo competitions, live music, and food vendors. The city also hosts the Vilhena Film Festival in October, showcasing local and international films. Additionally, the Vilhena Carnival in February is a vibrant celebration with parades, street parties, and music. To experience the full cultural tapestry of Vilhena, consider planning your visit around these events.

Solar Radiation and Potential

Vilhena, Brazil, in the state of Rondônia, is endowed with abundant solar radiation throughout the year. The city’s average daily solar radiation ranges from 3.8 to 6.4 kWh/m², making it a highly suitable location for solar energy development. The city’s strategic position between the Equator and the Tropic of Capricorn ensures a high concentration of solar energy during most of the year. Moreover, Vilhena experiences relatively low levels of cloud cover, further enhancing its solar energy potential.

Existing Solar Installations and Future Prospects

Vilhena has recognized the potential of solar energy and has made significant progress in developing solar power projects. There are currently several solar photovoltaic (PV) plants in operation, including the Vilhena Solar Complex, which has a capacity of 50 MW. In addition, numerous smaller-scale solar installations have been implemented in residential, commercial, and industrial sectors. The city has ambitious plans to expand its solar energy capacity further, aiming to become a leader in renewable energy production in the region. With favorable government policies and incentives, Vilhena is well-positioned to attract investments and accelerate the deployment of solar technology, contributing to its sustainable development and energy independence.

Elevation and Geology

Vilhena sits on the western edge of the Brazilian Shield, a vast and ancient geological formation characterized by its crystalline rocks and undulating terrain. The city’s elevation ranges from 400 to 600 meters (1,300 to 2,000 feet) above sea level. The underlying geology consists primarily of gneiss, granite, and other metamorphic rocks, which have been weathered and eroded over millions of years to create the region’s rolling hills and low mountains.

Landforms and River Basins

Vilhena is located in the transition zone between the Amazon Basin and the Cerrado savanna. As a result, the topography exhibits a mix of forested slopes and open grasslands. The region is drained by several major river basins, including the Jaru, Madeira, and Tapajós rivers. These rivers have carved deep valleys and created numerous waterfalls and rapids, which provide scenic attractions and support hydroelectric power generation. The area also features isolated mesas and buttes, which are remnants of ancient plateaus that have been eroded over time, leaving behind these distinctive geological formations.

Nearest Airport to Vilhena

The closest airport to Vilhena, Brazil, is Brigadeiro Camarão International Airport (BVH), located in Porto Velho, the capital of Rondônia state. BVH is approximately 280 kilometers (174 miles) from Vilhena and serves as the main gateway to the region. The airport offers domestic flights to major cities in Brazil, including São Paulo, Rio de Janeiro, and Brasília. Additionally, BVH serves as a hub for regional carriers providing flights to smaller cities within Rondônia and neighboring states.

Access and Ground Transportation

To reach Vilhena from BVH, there are several options for ground transportation. Visitors can take a taxi, which typically takes around 5 hours and costs approximately R$500 (about USD 100). Alternatively, bus services operate between BVH and Vilhena, with a journey time of around 6 hours and fares ranging from R$50 to R$80 (USD 10-16). Additionally, private transfer services are available, offering a more comfortable and customizable transportation option with prices varying based on the provider and vehicle type.

Geography and Climate

Vilhena is a municipality located in the southwestern region of the Brazilian state of Rondônia, approximately 650 kilometers (400 miles) from the state capital, Porto Velho. It covers an area of 11,561 square kilometers (4,464 square miles) and is bordered by the municipalities of Chupinguaia, Cerejeiras, Parecis, Pimenta Bueno, Colorado do Oeste, and Cabixi. The city is within the Amazon rainforest and has a humid tropical climate, with temperatures ranging from 22°C to 32°C (72°F to 90°F) throughout the year. The rainy season typically lasts from November to April, while the dry season runs from May to October.

Economy and Population

Vilhena is an important economic center in western Rondônia, primarily driven by agriculture, livestock, and mining. The municipality produces various agricultural products, including soybeans, corn, coffee, and livestock, such as cattle, pigs, and chickens. It is also home to significant mineral resources, including gold, cassiterite (tin ore), and manganese. The city has a population of approximately 95,000 inhabitants, according to the Brazilian Institute of Geography and Statistics (IBGE) in 2020. Vilhena is a major transportation hub, with access to the BR-174 highway and the Vilhena Airport. It is connected to other major cities in Rondônia, neighboring states, and the rest of Brazil, facilitating trade and tourism.