This report describes the typical weather at the VC Bird International Airport (Saint John's, Antigua and Barbuda) weather station over the course of an average January. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Saint John's has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by oceans and seas (94%) and croplands (5%).
The month of January is characterized by essentially constant daily high temperatures, with daily highs around 82°F throughout the month, exceeding 84°F or dropping below 80°F only one day in ten.
Over the course of January, the length of the day is essentially constant. The shortest day of the month is January 4 with 11:08 hours of daylight; the longest day is January 31 with 11:23 hours of daylight.
The earliest sunrise is at 6:36am on January 1; the latest sunset is at 6:02pm on January 31; the latest sunrise is at 6:41am on January 20; the earliest sunset is at 5:45pm on January 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 48% (partly cloudy) and does not vary substantially over the course of the month.
On January 16, a representative day, the sky is clear or mostly clear 29% of the time, partly cloudy 32% of the time, and mostly cloudy or overcast 15% of the time.
The average probability that some form of precipitation will be observed in a given day is 56%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are moderate rain and light rain.
Moderate rain is the most severe precipitation observed during 65% of those days with precipitation. It is most likely around January 26, when it is observed during 37% of all days.
Light rain is the most severe precipitation observed during 31% of those days with precipitation. It is most likely around January 21, when it is observed during 18% of all days.
Either snow is exceptionally unlikely to fall at this location in January or this station does not reliably report precipitation types.
The relative humidity typically ranges from 64% (mildly humid) to 89% (very humid) over the course of a typical January, rarely dropping below 55% (mildly humid) and reaching as high as 96% (very humid).
The air is driest around January 31, at which time the relative humidity drops below 68% (mildly humid) three days out of four; it is most humid around January 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 January, the dew point typically varies from 66°F (muggy) to 72°F (very muggy) and is rarely below 63°F (mildy humid) or above 75°F (very muggy).
Over the course of January typical wind speeds vary from 8 mph to 19 mph (gentle breeze to fresh breeze), rarely exceeding 25 mph (strong breeze).
The highest average wind speed of 14 mph (moderate breeze) occurs around January 10, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 14 mph (moderate breeze) occurs around January 1, at which time the average daily maximum wind speed is 18 mph (fresh breeze).