This report describes the typical weather at the Auckland Airport (Auckland, New Zealand) weather station over the course of an average July. It is based on the historical records from 1990 to 2012. Earlier records are either unavailable or unreliable.
Auckland has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by grasslands (47%), oceans and seas (28%), built-up areas (10%), lakes and rivers (10%), and forests (5%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 58°F throughout the month, exceeding 61°F or dropping below 54°F only one day in ten.
Over the course of July, the length of the day is gradually increasing. The shortest day of the month is July 1 with 9:39 hours of daylight; the longest day is July 31 with 10:14 hours of daylight.
The earliest sunrise is at 7:21am on July 31; the latest sunset is at 5:35pm on July 31; the latest sunrise is at 7:35am on July 2; the earliest sunset is at 5:14pm on July 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in July, so the entire month is in standard time.
The median cloud cover is 65% (partly cloudy) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 22% of the time, partly cloudy 24% of the time, and mostly cloudy or overcast 36% of the time.
The average probability that some form of precipitation will be observed in a given day is 65%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are moderate rain.
Moderate rain is the most severe precipitation observed during 75% of those days with precipitation. It is most likely around July 26, when it is observed during 49% 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 69% (mildly humid) to 95% (very humid) over the course of a typical July, rarely dropping below 59% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around July 4, at which time the relative humidity drops below 75% (humid) three days out of four; it is most humid around July 26, rising above 93% (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 July, the dew point typically varies from 42°F (dry) to 51°F (very comfortable) and is rarely below 35°F (dry) or above 56°F (comfortable).
The time of the month between July 1 and July 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of July typical wind speeds vary from 2 mph to 18 mph (light air to moderate breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 11 mph (gentle breeze) occurs around July 2, at which time the average daily maximum wind speed is 18 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around July 23, at which time the average daily maximum wind speed is 16 mph (moderate breeze).