This report describes the typical weather at the Robert L. Bradshaw International Airport (Basseterre, St. Kitts and Nevis) weather station over the course of an average October. It is based on the historical records from 1999 to 2012. Earlier records are either unavailable or unreliable.
Basseterre has a tropical monsoon climate with short dry season. The area within 25 mi of this station is covered by oceans and seas (95%), grasslands (3%), and forests (2%).
The month of October is characterized by essentially constant daily high temperatures, with daily highs around 87°F throughout the month, exceeding 89°F or dropping below 85°F only one day in ten.
Over the course of October, the length of the day is essentially constant. The shortest day of the month is October 31 with 11:30 hours of daylight; the longest day is October 1 with 11:58 hours of daylight.
The earliest sunrise is at 6:01am on October 1; the latest sunset is at 5:59pm on October 1; the latest sunrise is at 6:09am on October 31; the earliest sunset is at 5:40pm on October 31.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 56% (partly cloudy) to 64% (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 October 16, a representative day, the sky is clear or mostly clear 14% of the time, partly cloudy 22% of the time, and mostly cloudy or overcast 27% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around October 17, occurring in 45% of days. Precipitation is least likely around October 31, occurring in 41% of days.
Throughout October, the most common forms of precipitation are light rain, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 45% of those days with precipitation. It is most likely around October 18, when it is observed during 21% of all days.
Thunderstorms are the most severe precipitation observed during 36% of those days with precipitation. They are most likely around October 1, when it is observed during 18% of all days.
Moderate rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around October 24, when it is observed during 9% of all days.
Either snow is exceptionally unlikely to fall at this location in October or this station does not reliably report precipitation types.
The relative humidity typically ranges from 69% (mildly humid) to 91% (very humid) over the course of a typical October, rarely dropping below 63% (mildly humid) and reaching as high as 98% (very humid).
The air is driest around October 8, at which time the relative humidity drops below 72% (humid) three days out of four; it is most humid around October 17, rising above 88% (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 October, the dew point typically varies from 73°F (very muggy) to 78°F (oppressive) and is rarely below 71°F (muggy) or above 79°F (oppressive).
Over the course of October typical wind speeds vary from 3 mph to 13 mph (light breeze to moderate breeze), rarely exceeding 16 mph (moderate breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around October 27, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around October 5, at which time the average daily maximum wind speed is 12 mph (moderate breeze).