This report describes the typical weather at the Austin-Bergstrom International Airport (Austin, Texas, United States) weather station over the course of an average August. It is based on the historical records from 2000 to 2012. Earlier records are either unavailable or unreliable.
Austin, Texas has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by croplands (43%), grasslands (40%), forests (13%), and built-up areas (2%).
The month of August is characterized by gradually falling daily high temperatures, with daily highs around 96°F throughout the month, exceeding 101°F or dropping below 88°F only one day in ten.
Over the course of August, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 47 minutes, implying an average day-over-day decrease of 1.5 minutes.
The shortest day of the month is August 31 with 12:47 hours of daylight; the longest day is August 1 with 13:34 hours of daylight.
The earliest sunrise is at 6:49am on August 1; the latest sunset is at 8:23pm on August 1; the latest sunrise is at 7:07am on August 31; the earliest sunset is at 7:54pm on August 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in August, so the entire month is in daylight time.
The median cloud cover is 55% (partly cloudy) and does not vary substantially over the course of the month.
On August 16, a representative day, the sky is clear or mostly clear 30% of the time, partly cloudy 30% of the time, and mostly cloudy or overcast 40% of the time.
The average probability that some form of precipitation will be observed in a given day is 25%, with little variation over the course of the month.
Throughout August, the most common forms of precipitation are thunderstorms, light rain, and moderate rain.
Thunderstorms are the most severe precipitation observed during 49% of those days with precipitation. They are most likely around August 13, when it is observed during 14% of all days.
Light rain is the most severe precipitation observed during 33% of those days with precipitation. It is most likely around August 22, when it is observed during 9% of all days.
Moderate rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around August 26, when it is observed during 4% 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 37% (comfortable) to 94% (very humid) over the course of a typical August, rarely dropping below 25% (dry) and reaching as high as 99% (very humid).
The air is driest around August 10, at which time the relative humidity drops below 42% (comfortable) three days out of four; it is most humid around August 1, rising above 92% (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 63°F (mildy humid) to 74°F (very muggy) and is rarely below 57°F (comfortable) or above 76°F (oppressive).
Over the course of August typical wind speeds vary from 0 mph to 15 mph (calm to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around August 5, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around August 31, at which time the average daily maximum wind speed is 14 mph (moderate breeze).