Weather in Cusco in December takes center stage, as the city experiences a gradual transition from autumn to winter. Cusco’s unique geography, nestled in the Andean mountains, contributes to its distinct climate patterns. The region’s dry season in June to September leads to fewer rain showers during this period. However, occasional heavy rainfall can still occur due to the presence of low-lying clouds and high humidity.
The city’s elevation and surrounding mountains create a temperature gradient, leading to significant fluctuations between day and night. On average, December temperatures range from 10°C to 16°C (50°F to 61°F). Sunshine and cloud cover exhibit variations throughout the month. Low-lying clouds often hinder direct sunlight during mornings, but afternoons tend to be sunnier. Wind patterns during December are characterized by dominant southwesterly winds, which can impact air quality. Understanding these climate patterns is crucial for visitors and locals alike, planning activities and managing their expectations.
Precipitation and Rainfall Patterns in December
In Cusco, December marks the start of the wet season, which is an essential aspect of the city’s climate. The Andean dry season, which spans from May to September, is characterized by limited rainfall due to the region’s unique geography and atmospheric conditions. However, as the dry season comes to an end, the likelihood of rainfall increases in December due to changes in wind patterns and temperature fluctuations.
The city’s elevation plays a crucial role in shaping the precipitation patterns in Cusco. As the Andes mountain range rises, the air cools, and its capacity to hold moisture decreases, leading to the formation of rain clouds. When these clouds reach the city, they release their moisture, resulting in precipitation. This process is known as orographic lift, where the terrain forces the air to rise, cool, and condense, ultimately producing rainfall.
Cusco has experienced severe weather events in the past, including landslides, flash floods, and heavy rainfall. One notable example occurred in 2017, when the city recorded heavy rainfall, resulting in widespread flooding and landslides. The event highlighted the importance of preparedness and contingency planning for severe weather events in the region.
Effects of Elevation on Rainfall
The city’s elevation has a significant impact on the formation of rain clouds. As the air rises, it cools, and its capacity to hold moisture decreases, leading to the formation of rain clouds. This process is known as orographic lift.
- Rainfall increases with elevation: The higher the elevation, the more rainfall is recorded.
- Temperature and humidity fluctuations: The Andes mountain range creates a unique microclimate, where temperature and humidity fluctuations are more pronounced, leading to the formation of rain clouds.
The effects of elevation on rainfall are evident in the city’s precipitation patterns. For instance, the highest rainfall in Cusco is recorded in the mountainous areas surrounding the city, while the city’s central areas receive less rainfall due to the urban heat island effect.
Severe Weather Events, Weather in cusco in december
Cusco has experienced several severe weather events in recent years, highlighting the importance of preparedness and contingency planning. These events have significant impacts on the city and its inhabitants, including damage to infrastructure, loss of life, and economic disruption.
| Event | Date | |
|---|---|---|
| Landslide and flash flood | May 2018 | 11 people killed, 20 injured, widespread destruction of infrastructure |
| Heavy rainfall and flooding | December 2017 | Widespread flooding, landslides, and damage to infrastructure |
The frequency and severity of severe weather events in Cusco underscore the need for effective emergency preparedness and contingency planning. The city and its inhabitants must be vigilant and take proactive measures to mitigate the impacts of these events.
Sunshine and Cloud Cover in December: Weather In Cusco In December
In December, Cusco experiences a slight decrease in sunshine hours compared to the preceding months, which are dominated by clear sky conditions. However, the cloud cover remains relatively low throughout the month, resulting in a pleasant and sunny climate that makes it an ideal time to visit and explore the historic city.
Cloud Cover Variations in December
The cloud cover in Cusco during December is characterized by low-lying clouds that frequently form in the valleys, but these clouds rarely cover the entire sky. As a result, the amount of direct sunlight received during the day remains relatively high. The average daily cloud cover in Cusco in December is around 20 – 30%, with most of the clouds dissipating by mid-morning.
Effect of Low-Lying Clouds on Sunshine
Low-lying clouds can significantly impact the amount of direct sunlight received in a given area. These clouds often form in valleys and can cover a large portion of the sky, reducing the amount of direct sunlight that reaches the ground. In Cusco, low-lying clouds can persist for several hours during the morning and late afternoon, but they typically clear up by mid-morning, allowing for a significant amount of direct sunlight to be received during the day.
Sunny Days in December
According to data from the Peruvian National Meteorological and Hydrological Service (Servicio Nacional de Meteorología e Hydrología del Perú), Cusco receives an average of 22 sunny days per month in December. This means that approximately 70% of the days in December in Cusco experience clear sky conditions, making it an ideal time to visit and enjoy the city’s beautiful scenery and historic landmarks.
Wind Patterns and Humidity in December
Cusco’s Andean climate brings a unique set of wind patterns during December, affecting not only the temperature but also the air quality and humidity levels. In this section, we’ll delve into the dominant wind patterns and discuss their implications on the city’s climate.
As the dry season begins to fade, the wind direction in Cusco starts to shift. During December, the dominant wind pattern is the trade wind, which blows from the east and southeast. This wind direction brings in dry air from the eastern parts of the Andes, contributing to the decline in humidity levels. The trade wind also leads to the formation of cold fronts, which can bring significant temperature drops and increased winds.
Wind Direction and Speed
The trade wind plays a crucial role in determining the wind direction and speed in Cusco. As the winds blow from the east and southeast, they create a gentle to moderate breeze, with speeds ranging from 10 to 25 km/h. This wind speed is relatively stable, providing a comfortable climate for tourists and locals alike.
However, the wind speed can increase significantly during periods of cold fronts, reaching speeds of up to 50 km/h or more. These gusty winds can cause disruptions to daily life, including flight cancellations, road closures, and power outages.
Implications on Air Quality
The trade wind has a positive impact on Cusco’s air quality, carrying away pollutants and particulate matter from the city. However, the wind speed and direction can also lead to the accumulation of pollutants in certain areas, particularly during periods of calm weather. The city’s altitude and location in the Andes exacerbate this issue, as pollutants are trapped in the valley.
As a result, residents and visitors should be mindful of the air quality during December, especially during periods of calm weather. Taking necessary precautions, such as wearing masks and avoiding strenuous activities, can help minimize the risks associated with poor air quality.
Humidity Levels
The trade wind also plays a significant role in Cusco’s humidity levels, which decrease significantly during December. With an average relative humidity of 40-50%, the city experiences a dry and crisp climate, making it ideal for outdoor activities. However, the low humidity levels can also exacerbate respiratory issues, particularly for individuals with pre-existing conditions.
In summary, the trade wind dominating Cusco’s climate during December brings a unique set of wind patterns and humidity levels. Understanding these factors is essential for tourists and locals alike, ensuring a comfortable and healthy experience in the city.
Final Thoughts
With a comprehensive understanding of Cusco’s weather in December, travelers can prepare themselves for the potential challenges and make the most of their experience in this breathtaking Andean city. By embracing its unique climate and geography, they will be rewarded with unforgettable adventures.
Question & Answer Hub
Q: How much rainfall can I expect in Cusco in December?
A: Although December is part of the dry season, Cusco can experience occasional heavy rainfall due to low-lying clouds and high humidity.
Q: What is the average temperature in Cusco in December?
A: On average, December temperatures in Cusco range from 10°C to 16°C (50°F to 61°F). Expect significant fluctuations between day and night.
Q: Can I expect a lot of sunshine in Cusco in December?
A: Yes, afternoons tend to be sunnier, but mornings are often cloudier due to the presence of low-lying clouds. Be prepared for occasional rain showers.
Q: What wind patterns dominate Cusco in December?
A: Southwesterly winds are the dominant wind direction in December, which can impact air quality.
