Climate and Average Weather Year Round in Ilave Peru

The climate in Ilave is cool and mostly cloudy. Over the course of the year, the temperature typically varies from 30°F to 62°F and is rarely below 27°F or above 67°F.

Based on the tourism score, the best time of year to visit Ilave for warm-weather activities is from early October to early December.

The temperature in Ilave varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

In Ilave, 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 in Ilave begins around April 20 and lasts for 5.2 months, ending around September 28.

The clearest month of the year in Ilave is July, during which on average the sky is clear, mostly clear, or partly cloudy 70% of the time.

The cloudier part of the year begins around September 28 and lasts for 6.8 months, ending around April 20.

The cloudiest month of the year in Ilave is January, during which on average the sky is overcast or mostly cloudy 83% 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 in Ilave varies significantly throughout the year.

The wetter season lasts 3.3 months, from December 15 to March 26, with a greater than 21% chance of a given day being a wet day. The month with the most wet days in Ilave is January, with an average of 11.9 days with at least 0.04 inches of precipitation.

The drier season lasts 8.7 months, from March 26 to December 15. The month with the fewest wet days in Ilave is July, with an average of 0.3 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 in Ilave is January, with an average of 11.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 41% on January 14.

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. Ilave experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.3 months, from October 9 to April 19, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Ilave is January, with an average rainfall of 2.4 inches.

The rainless period of the year lasts for 5.7 months, from April 19 to October 9. The month with the least rain in Ilave is July, with an average rainfall of 0.0 inches.

The length of the day in Ilave varies over the course of the year. In 2024, the shortest day is June 20, with 11 hours, 10 minutes of daylight; the longest day is December 21, with 13 hours, 5 minutes of daylight.

The earliest sunrise is at 4:56 AM on November 22, and the latest sunrise is 1 hour, 11 minutes later at 6:07 AM on July 8. The earliest sunset is at 5:13 PM on June 2, and the latest sunset is 1 hour, 4 minutes later at 6:17 PM on January 19.

Daylight saving time (DST) is not observed in Ilave during 2024.

The figure below presents a compact representation of key lunar data for 2024. 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 in Ilave, 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 in Ilave experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.0 months, from October 10 to April 9, with average wind speeds of more than 7.2 miles per hour. The windiest month of the year in Ilave is February, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 6.0 months, from April 9 to October 10. The calmest month of the year in Ilave is May, with an average hourly wind speed of 6.0 miles per hour.

The predominant average hourly wind direction in Ilave varies throughout the year.

The wind is most often from the north for 2.3 weeks, from May 3 to May 19 and for 2.9 months, from July 23 to October 21, with a peak percentage of 45% on September 24. The wind is most often from the west for 2.1 months, from May 19 to July 23, with a peak percentage of 37% on July 3. The wind is most often from the east for 6.4 months, from October 21 to May 3, with a peak percentage of 52% on January 1.

To characterize how pleasant the weather is in Ilave 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 time of year to visit Ilave for general outdoor tourist activities is from early October to early December, with a peak score in the third week of November.

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 Ilave for hot-weather activities is from mid November to early December, with a peak score in the third 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 in Ilave typically lasts for 8.7 months (263 days), from around August 31 to around May 21, rarely starting before August 12 or after September 20, and rarely ending before May 2 or after June 7.

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 in Ilave should appear around August 20, only rarely appearing before August 7 or after September 6.

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.

The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.2 months, from October 9 to December 16, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest month of the year in Ilave is November, with an average of 7.5 kWh.

The darker period of the year lasts for 2.5 months, from May 9 to July 24, with an average daily incident shortwave energy per square meter below 6.0 kWh. The darkest month of the year in Ilave is June, with an average of 5.6 kWh.

For the purposes of this report, the geographical coordinates of Ilave are -16.083 deg latitude, -69.667 deg longitude, and 12,602 ft elevation.

The topography within 2 miles of Ilave contains only modest variations in elevation, with a maximum elevation change of 443 feet and an average elevation above sea level of 12,659 feet. Within 10 miles contains only modest variations in elevation (2,448 feet). Within 50 miles contains large variations in elevation (5,308 feet).

The area within 2 miles of Ilave is covered by grassland (32%), bare soil (24%), trees (21%), and cropland (15%), within 10 miles by grassland (27%) and shrubs (25%), and within 50 miles by water (34%) and shrubs (20%).