This report describes the typical weather at the Subteniente FAP Alejandro Velasco Astete International Airport (Cusco, Peru) weather station over the course of an average July. It is based on the historical records from 1987 to 2012. Earlier records are either unavailable or unreliable.
Cusco has a mild temperate climate with dry winters and warm summers. The area within 25 mi of this station is covered by grasslands (86%), shrublands (5%), and croplands (5%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 67°F throughout the month, exceeding 71°F or dropping below 61°F only one day in ten.
Over the course of July, the length of the day is essentially constant. The shortest day of the month is July 5 with 11:21 hours of daylight; the longest day is July 31 with 11:32 hours of daylight.
The earliest sunrise is at 6:08am on July 31; the latest sunset is at 5:40pm on July 31; the latest sunrise is at 6:12am on July 6; the earliest sunset is at 5:32pm on July 1.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover is 14% (mostly clear) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 73% of the time, partly cloudy 13% of the time, and mostly cloudy or overcast 10% of the time.
The average probability that some form of precipitation will be observed in a given day is 9%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are light rain, drizzle, and moderate rain.
Light rain is the most severe precipitation observed during 39% of those days with precipitation. It is most likely around July 31, when it is observed during 4% of all days.
Drizzle is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around July 30, when it is observed during 3% of all days.
Moderate rain is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around July 24, when it is observed during 3% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 25% (dry) to 89% (very humid) over the course of a typical July, rarely dropping below 13% (very dry) and reaching as high as 100% (very humid).
The air is driest around July 30, at which time the relative humidity drops below 32% (comfortable) three days out of four; it is most humid around July 1, rising above 81% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical July, the dew point typically varies from 25°F (dry) to 38°F (dry) and is rarely below 15°F (dry) or above 43°F (dry).
Over the course of July typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 20 mph (fresh breeze).
The highest average wind speed of 3 mph (light air) occurs around July 22, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 3 mph (light air) occurs around July 1, at which time the average daily maximum wind speed is 11 mph (gentle breeze).