This report describes the typical weather at the São Paulo-Guarulhos International Airport (São Paulo, Brazil) weather station over the course of an average June. It is based on the historical records from 1988 to 2012. Earlier records are either unavailable or unreliable.
São Paulo has a warm temperate climate with dry winters and hot summers. The area within 25 mi of this station is covered by grasslands (36%), croplands (24%), built-up areas (21%), forests (9%), and shrublands (9%).
The month of June is characterized by essentially constant daily high temperatures, with daily highs around 72°F throughout the month, exceeding 80°F or dropping below 64°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 27 with 10:41 hours of daylight; the longest day is June 1 with 10:47 hours of daylight.
The earliest sunrise is at 6:40am on June 1; the latest sunset is at 5:31pm on June 30; the latest sunrise is at 6:49am on June 28; the earliest sunset is at 5:27pm on June 5.
Daylight savings time is observed in 2012 but it neither starts nor ends in June, so the entire month is in standard time.
The median cloud cover is 84% (mostly cloudy) and does not vary substantially over the course of the month.
On June 15, a representative day, the sky is clear or mostly clear 17% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 44% of the time.
The average probability that some form of precipitation will be observed in a given day is 30%, with little variation over the course of the month.
Throughout June, the most common forms of precipitation are light rain, drizzle, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 38% of those days with precipitation. It is most likely around June 1, when it is observed during 13% of all days.
Drizzle is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around June 29, when it is observed during 10% of all days.
Thunderstorms are the most severe precipitation observed during 17% of those days with precipitation. They are most likely around June 1, when it is observed during 6% of all days.
Moderate rain is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around June 29, when it is observed during 5% 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 53% (mildly humid) to 99% (very humid) over the course of a typical June, rarely dropping below 36% (comfortable) and reaching as high as 100% (very humid).
The air is driest around June 26, at which time the relative humidity drops below 63% (mildly humid) three days out of four; it is most humid around June 1, rising above 100% (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 51°F (very comfortable) to 60°F (comfortable) and is rarely below 45°F (dry) or above 65°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 1 mph to 11 mph (calm to gentle breeze), rarely exceeding 16 mph (moderate breeze).
The highest average wind speed of 6 mph (light breeze) occurs around June 29, 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 23, at which time the average daily maximum wind speed is 11 mph (gentle breeze).