This report describes the typical weather at the Maurice Bishop International Airport (St. George's, Grenada) weather station over the course of an average January. It is based on the historical records from 1991 to 2012. Earlier records are either unavailable or unreliable.
St. George's has a tropical rainforest climate with no dry season. The area within 25 mi of this station is covered by oceans and seas (94%) and grasslands (5%).
The month of January is characterized by essentially constant daily high temperatures, with daily highs around 84°F throughout the month, exceeding 86°F or dropping below 82°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 6 with 11:26 hours of daylight; the longest day is January 29 with 11:36 hours of daylight.
The earliest sunrise is at 6:27am on January 1; the latest sunset is at 6:09pm on January 31; the latest sunrise is at 6:33am on January 25; the earliest sunset is at 5:54pm on January 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 43% (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 38% of the time, partly cloudy 26% of the time, and mostly cloudy or overcast 20% of the time.
The average probability that some form of precipitation will be observed in a given day is 59%, 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 59% of those days with precipitation. It is most likely around January 1, when it is observed during 36% of all days.
Light rain is the most severe precipitation observed during 36% of those days with precipitation. It is most likely around January 31, when it is observed during 23% 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 66% (mildly humid) to 91% (very humid) over the course of a typical January, rarely dropping below 60% (mildly humid) and reaching as high as 98% (very humid).
The air is driest around January 31, at which time the relative humidity drops below 70% (mildly humid) three days out of four; it is most humid around January 4, 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 January, the dew point typically varies from 69°F (muggy) to 75°F (very muggy) and is rarely below 67°F (muggy) or above 77°F (oppressive).
Over the course of January typical wind speeds vary from 4 mph to 19 mph (light breeze to fresh breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 12 mph (moderate breeze) occurs around January 31, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 11 mph (gentle breeze) occurs around January 6, at which time the average daily maximum wind speed is 17 mph (moderate breeze).