This report describes the typical weather at the Fulton County Airport (Brown Field) (Atlanta, Georgia, United States) weather station over the course of an average August. It is based on the historical records from 1982 to 2012. Earlier records are either unavailable or unreliable.
Atlanta, Georgia 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 (38%), forests (36%), and built-up areas (25%).
The month of August is characterized by gradually falling daily high temperatures, with daily highs around 87°F throughout the month, exceeding 95°F or dropping below 79°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 55 minutes, implying an average day-over-day decrease of 1.8 minutes.
The shortest day of the month is August 31 with 12:53 hours of daylight; the longest day is August 1 with 13:48 hours of daylight.
The earliest sunrise is at 6:50am on August 1; the latest sunset is at 8:38pm on August 1; the latest sunrise is at 7:12am on August 31; the earliest sunset is at 8:04pm 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 ranges from 45% (partly cloudy) to 50% (partly cloudy).
On August 16, a representative day, the sky is clear or mostly clear 42% of the time, partly cloudy 17% of the time, and mostly cloudy or overcast 40% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around August 2, occurring in 40% of days. Precipitation is least likely around August 31, occurring in 31% of days.
Throughout August, the most common forms of precipitation are thunderstorms, light rain, moderate rain, and heavy rain.
Thunderstorms are the most severe precipitation observed during 48% of those days with precipitation. They are most likely around August 1, when it is observed during 20% of all days.
Light rain is the most severe precipitation observed during 26% of those days with precipitation. It is most likely around August 4, when it is observed during 10% of all days.
Moderate rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around August 29, when it is observed during 5% of all days.
Heavy rain is the most severe precipitation observed during 10% of those days with precipitation. It is most likely around August 2, 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 50% (comfortable) to 96% (very humid) over the course of a typical August, rarely dropping below 34% (comfortable) and reaching as high as 100% (very humid).
The air is driest around August 13, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around August 30, 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 August, the dew point typically varies from 62°F (mildy humid) to 72°F (very muggy) and is rarely below 55°F (comfortable) or above 75°F (very muggy).
Over the course of August typical wind speeds vary from 0 mph to 11 mph (calm to gentle breeze), rarely exceeding 16 mph (moderate breeze).
The highest average wind speed of 4 mph (light breeze) occurs around August 1, at which time the average daily maximum wind speed is 11 mph (gentle breeze).
The lowest average wind speed of 4 mph (light breeze) occurs around August 18, at which time the average daily maximum wind speed is 10 mph (gentle breeze).