This report describes the typical weather at the Cairns International Airport (Cairns, Australia) weather station over the course of an average August. It is based on the historical records from 1988 to 2012. Earlier records are either unavailable or unreliable.
Cairns has a tropical monsoon climate with short dry season. The area within 25 mi of this station is covered by oceans and seas (46%), forests (34%), and grasslands (20%).
The month of August is characterized by gradually rising daily high temperatures, with daily highs around 79°F throughout the month, exceeding 84°F or dropping below 74°F only one day in ten.
Over the course of August, the length of the day is essentially constant. The shortest day of the month is August 1 with 11:22 hours of daylight; the longest day is August 30 with 11:46 hours of daylight.
The earliest sunrise is at 6:24am on August 31; the latest sunset is at 6:11pm on August 30; the latest sunrise is at 6:42am on August 1; the earliest sunset is at 6:04pm on August 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 38% (mostly clear) to 45% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 8% from the start to the end of the month.
On August 16, a representative day, the sky is clear or mostly clear 46% of the time, partly cloudy 19% of the time, and mostly cloudy or overcast 26% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around August 3, occurring in 42% of days. Precipitation is least likely around August 30, occurring in 37% of days.
Throughout August, the most common forms of precipitation are moderate rain, light rain, and drizzle.
Moderate rain is the most severe precipitation observed during 51% of those days with precipitation. It is most likely around August 2, when it is observed during 21% of all days.
Light rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around August 3, when it is observed during 15% of all days.
Drizzle is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around August 4, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in August or this station does not reliably report precipitation types.
The relative humidity typically ranges from 49% (comfortable) to 90% (very humid) over the course of a typical August, rarely dropping below 36% (comfortable) and reaching as high as 97% (very humid).
The air is driest around August 17, at which time the relative humidity drops below 55% (mildly humid) three days out of four; it is most humid around August 31, rising above 85% (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 August, the dew point typically varies from 55°F (very comfortable) to 66°F (muggy) and is rarely below 46°F (dry) or above 70°F (muggy).
The time of the month between August 1 and August 29 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of August typical wind speeds vary from 2 mph to 16 mph (light air to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around August 10, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around August 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).