Climate and Average Weather Year Round at Alejandro Velasco Astete International Airport Peru

At Alejandro Velasco Astete International Airport, the wet season is overcast, the dry season is partly cloudy, and it is comfortable year round. Over the course of the year, the temperature typically varies from 33°F to 67°F and is rarely below 29°F or above 72°F.

Based on the tourism score, the best times of year to visit Alejandro Velasco Astete International Airport for warm-weather activities are from late April to mid June and from early July to early October.

The temperature at Alejandro Velasco Astete International Airport varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

At Alejandro Velasco Astete International Airport, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year at Alejandro Velasco Astete International Airport begins around May 7 and lasts for 4.3 months, ending around September 15.

The clearest month of the year at Alejandro Velasco Astete International Airport is July, during which on average the sky is clear, mostly clear, or partly cloudy 55% of the time.

The cloudier part of the year begins around September 15 and lasts for 7.7 months, ending around May 7.

The cloudiest month of the year at Alejandro Velasco Astete International Airport is January, during which on average the sky is overcast or mostly cloudy 93% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Alejandro Velasco Astete International Airport varies significantly throughout the year.

The wetter season lasts 4.4 months, from November 16 to March 30, with a greater than 27% chance of a given day being a wet day. The month with the most wet days at Alejandro Velasco Astete International Airport is January, with an average of 15.5 days with at least 0.04 inches of precipitation.

The drier season lasts 7.6 months, from March 30 to November 16. The month with the fewest wet days at Alejandro Velasco Astete International Airport is July, with an average of 0.8 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone at Alejandro Velasco Astete International Airport is January, with an average of 15.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 51% on January 15.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Alejandro Velasco Astete International Airport experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.4 months, from September 17 to April 29, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain at Alejandro Velasco Astete International Airport is January, with an average rainfall of 4.2 inches.

The rainless period of the year lasts for 4.6 months, from April 29 to September 17. The month with the least rain at Alejandro Velasco Astete International Airport is July, with an average rainfall of 0.1 inches.

The length of the day at Alejandro Velasco Astete International Airport varies over the course of the year. In 2023, the shortest day is June 21, with 11 hours, 20 minutes of daylight; the longest day is December 21, with 12 hours, 56 minutes of daylight.

The earliest sunrise is at 5:09 AM on November 21, and the latest sunrise is 1 hour, 2 minutes later at 6:12 AM on July 10. The earliest sunset is at 5:26 PM on May 31, and the latest sunset is 56 minutes later at 6:22 PM on January 22.

Daylight saving time (DST) is not observed at Alejandro Velasco Astete International Airport during 2023.

The figure below presents a compact representation of key lunar data for 2023. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level at Alejandro Velasco Astete International Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Alejandro Velasco Astete International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 4.4 months, from July 13 to November 25, with average wind speeds of more than 5.4 miles per hour. The windiest month of the year at Alejandro Velasco Astete International Airport is September, with an average hourly wind speed of 6.1 miles per hour.

The calmer time of year lasts for 7.6 months, from November 25 to July 13. The calmest month of the year at Alejandro Velasco Astete International Airport is April, with an average hourly wind speed of 4.6 miles per hour.

The predominant average hourly wind direction at Alejandro Velasco Astete International Airport is from the north throughout the year.

To characterize how pleasant the weather is at Alejandro Velasco Astete International Airport throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Alejandro Velasco Astete International Airport for general outdoor tourist activities are from late April to mid June and from early July to early October, with a peak score in the last week of August.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Alejandro Velasco Astete International Airport for hot-weather activities is from mid October to late November, with a peak score in the first week of November.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Alejandro Velasco Astete International Airport typically lasts for 9.9 months (302 days), from around August 13 to around June 10, rarely starting before July 13 or after September 5, and rarely ending before May 17 or after July 6.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms at Alejandro Velasco Astete International Airport should appear around July 23, only rarely appearing before July 19 or after July 28.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

For the purposes of this report, the geographical coordinates of Alejandro Velasco Astete International Airport are -13.536 deg latitude, -71.939 deg longitude, and 10,774 ft elevation.

The topography within 2 miles of Alejandro Velasco Astete International Airport contains very significant variations in elevation, with a maximum elevation change of 1,430 feet and an average elevation above sea level of 11,111 feet. Within 10 miles contains very significant variations in elevation (6,063 feet). Within 50 miles also contains extreme variations in elevation (18,294 feet).

The area within 2 miles of Alejandro Velasco Astete International Airport is covered by shrubs (48%) and artificial surfaces (39%), within 10 miles by grassland (43%) and shrubs (38%), and within 50 miles by grassland (43%) and shrubs (31%).