This report describes the typical weather at the Sangster International Airport (Montego Bay, Jamaica) weather station over the course of an average August. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Montego Bay has a tropical monsoon climate with short dry season. The area within 25 mi of this station is covered by oceans and seas (55%) and forests (41%).
The month of August is characterized by essentially constant daily high temperatures, with daily highs around 89°F throughout the month, exceeding 91°F or dropping below 86°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 31 with 12:29 hours of daylight; the longest day is August 1 with 12:56 hours of daylight.
The earliest sunrise is at 5:50am on August 3; the latest sunset is at 6:46pm on August 1; the latest sunrise is at 5:57am on August 31; the earliest sunset is at 6:27pm on August 31.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 47% (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 38% of the time, partly cloudy 23% of the time, and mostly cloudy or overcast 22% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around August 31, occurring in 55% of days. Precipitation is least likely around August 1, occurring in 47% of days.
Throughout August, the most common forms of precipitation are thunderstorms, moderate rain, and light rain.
Thunderstorms are the most severe precipitation observed during 77% of those days with precipitation. They are most likely around August 31, when it is observed during 42% of all days.
Moderate rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around August 26, when it is observed during 7% of all days.
Light rain is the most severe precipitation observed during 10% of those days with precipitation. It is most likely around August 29, 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 64% (mildly humid) to 90% (very humid) over the course of a typical August, rarely dropping below 56% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around August 3, at which time the relative humidity drops below 67% (mildly humid) three days out of four; it is most humid around August 16, rising above 84% (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 71°F (very muggy) to 78°F (oppressive) and is rarely below 67°F (muggy) or above 81°F (very oppressive).
Over the course of August typical wind speeds vary from 0 mph to 20 mph (calm to fresh breeze), rarely exceeding 27 mph (strong breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around August 1, at which time the average daily maximum wind speed is 20 mph (fresh breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around August 31, at which time the average daily maximum wind speed is 18 mph (moderate breeze).