This report describes the typical weather at the Jorge Chávez International Airport (Callao/Lima, Peru) weather station over the course of an average June. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Callao/Lima has a hot desert climate. The area within 25 mi of this station is covered by oceans and seas (94%) and built-up areas (3%).
The month of June is characterized by gradually falling daily high temperatures, with daily highs around 68°F throughout the month, exceeding 74°F or dropping below 63°F only one day in ten.
Over the course of June, the length of the day is essentially constant. The shortest day of the month is June 24 with 11:25 hours of daylight; the longest day is June 1 with 11:28 hours of daylight.
The earliest sunrise is at 6:23am on June 1; the latest sunset is at 5:56pm on June 30; the latest sunrise is at 6:29am on June 30; the earliest sunset is at 5:50pm on June 4.
Daylight savings time (DST) is not observed in 2012.
The median cloud cover ranges from 79% (partly cloudy) to 92% (mostly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 13% from the start to the end of the month.
On June 1, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 48% of the time, and overcast or mostly cloudy 49% of the time.
On June 30, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 88% of the time, and clear or mostly clear 10% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around June 30, occurring in 39% of days. Precipitation is least likely around June 1, occurring in 27% of days.
Throughout June, the most common forms of precipitation are drizzle.
Drizzle is the most severe precipitation observed during 96% of those days with precipitation. It is most likely around June 30, when it is observed during 38% of all days.
Either snow is exceptionally unlikely to fall at this location in June or this station does not reliably report precipitation types.
The relative humidity typically ranges from 72% (humid) to 96% (very humid) over the course of a typical June, rarely dropping below 62% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around June 2, at which time the relative humidity drops below 77% (humid) three days out of four; it is most humid around June 1, rising above 94% (very 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 June, the dew point typically varies from 57°F (comfortable) to 61°F (comfortable) and is rarely below 54°F (very comfortable) or above 64°F (mildy humid).
The time of the month between June 1 and June 30 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of June typical wind speeds vary from 0 mph to 12 mph (calm to gentle breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around June 24, at which time the average daily maximum wind speed is 11 mph (gentle breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around June 11, at which time the average daily maximum wind speed is 11 mph (gentle breeze).