This report describes the typical weather at the Ixtapa-Zihuatanejo International Airport (Ixtapa-Zihuatanejo, Mexico) weather station over the course of an average January. It is based on the historical records from 1981 to 2012. Earlier records are either unavailable or unreliable.
Ixtapa-Zihuatanejo has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by oceans and seas (47%), forests (37%), croplands (14%), and grasslands (3%).
The month of January is characterized by essentially constant daily high temperatures, with daily highs around 86°F throughout the month, exceeding 88°F or dropping below 84°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 11:07 hours of daylight; the longest day is January 31 with 11:22 hours of daylight.
The earliest sunrise is at 7:16am on January 1; the latest sunset is at 6:40pm on January 31; the latest sunrise is at 7:20am on January 18; the earliest sunset is at 6:23pm on January 1.
Daylight saving time is observed in 2012 but it neither starts nor ends in January, so the entire month is in standard time.
The median cloud cover ranges from 18% (mostly clear) to 27% (mostly clear). The trend is for the sky to be clearing with the median cloud cover decreasing by 9% from the start to the end of the month.
On January 16, a representative day, the sky is clear or mostly clear 29% of the time, partly cloudy 15% of the time, and mostly cloudy or overcast 13% of the time.
The average probability that some form of precipitation will be observed in a given day is 3%, with little variation over the course of the month.
Throughout January, the most common forms of precipitation are drizzle, moderate rain, and light rain.
Drizzle is the most severe precipitation observed during 39% of those days with precipitation. It is most likely around January 31, when it is observed during 1% of all days.
Moderate rain is the most severe precipitation observed during 35% of those days with precipitation. It is most likely around January 1, when it is observed during 1% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around January 19, when it is observed during 0% 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 58% (mildly humid) to 91% (very humid) over the course of a typical January, rarely dropping below 48% (comfortable) and reaching as high as 100% (very humid).
The air is driest around January 27, at which time the relative humidity drops below 64% (mildly humid) three days out of four; it is most humid around January 1, 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 January, the dew point typically varies from 61°F (comfortable) to 74°F (very muggy) and is rarely below 56°F (comfortable) or above 77°F (oppressive).
Over the course of January typical wind speeds vary from 0 mph to 12 mph (calm to gentle breeze), rarely exceeding 17 mph (moderate breeze).
The highest average wind speed of 4 mph (light breeze) occurs around January 31, at which time the average daily maximum wind speed is 12 mph (gentle breeze).
The lowest average wind speed of 3 mph (light air) occurs around January 3, at which time the average daily maximum wind speed is 12 mph (gentle breeze).