This report describes the typical weather at the Sangster International Airport (Montego Bay, Jamaica) weather station over the course of an average June. 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 June is characterized by essentially constant daily high temperatures, with daily highs around 88°F throughout the month, exceeding 91°F or dropping below 85°F only one day in ten.
Over the course of June, the length of the day is essentially constant. The shortest day of the month is June 1 with 13:10 hours of daylight; the longest day is June 17 with 13:15 hours of daylight.
The earliest sunrise is at 5:34am on June 7; the latest sunset is at 6:52pm on June 30; the latest sunrise is at 5:39am on June 30; the earliest sunset is at 6:45pm on June 1.
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 June 15, a representative day, the sky is clear or mostly clear 38% of the time, partly cloudy 21% of the time, and mostly cloudy or overcast 24% of the time.
The average probability that some form of precipitation will be observed in a given day is 47%, with little variation over the course of the month.
Throughout June, the most common forms of precipitation are thunderstorms, moderate rain, and light rain.
Thunderstorms are the most severe precipitation observed during 62% of those days with precipitation. They are most likely around June 29, when it is observed during 32% of all days.
Moderate rain is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around June 1, when it is observed during 11% of all days.
Light rain is the most severe precipitation observed during 16% of those days with precipitation. It is most likely around June 4, when it is observed during 8% of all days.
Either snow is exceptionally unlikely to fall at this location in June or this station does not reliably report precipitation types.
The relative humidity typically ranges from 63% (mildly humid) to 91% (very humid) over the course of a typical June, rarely dropping below 55% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around June 27, at which time the relative humidity drops below 67% (mildly humid) three days out of four; it is most humid around June 1, rising above 85% (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 June, the dew point typically varies from 70°F (muggy) to 77°F (oppressive) and is rarely below 67°F (muggy) or above 81°F (very oppressive).
Over the course of June typical wind speeds vary from 0 mph to 21 mph (calm to fresh breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around June 30, at which time the average daily maximum wind speed is 21 mph (fresh breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around June 1, at which time the average daily maximum wind speed is 18 mph (fresh breeze).