January Weather in Haiti Haiti

Daily high temperatures are around 88°F, rarely falling below 86°F or exceeding 91°F. The lowest daily average high temperature is 88°F on January 15.

Daily low temperatures are around 73°F, rarely falling below 70°F or exceeding 76°F. The lowest daily average low temperature is 73°F on January 22.

For reference, on August 6, the hottest day of the year, temperatures in Haiti typically range from 80°F to 94°F, while on January 21, the coldest day of the year, they range from 73°F to 88°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

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The month of January in Haiti experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 21% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 20% on January 13.

The clearest day of the month is January 13, with clear, mostly clear, or partly cloudy conditions 80% of the time.

For reference, on June 1, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on January 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Haiti, the chance of a wet day over the course of January is essentially constant, remaining around 6% throughout.

For reference, the year's highest daily chance of a wet day is 18% on May 21, and its lowest chance is 5% on February 15.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during January in Haiti is essentially constant, remaining about 0.4 inches throughout, and rarely exceeding 1.5 inches.

The lowest average 31-day accumulation is 0.4 inches on January 7.

Over the course of January in Haiti, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 17 minutes, implying an average daily increase of 35 seconds, and weekly increase of 4 minutes, 3 seconds.

The shortest day of the month is January 1, with 11 hours, 0 minutes of daylight and the longest day is January 31, with 11 hours, 18 minutes of daylight.

The earliest sunrise of the month in Haiti is 6:22 AM on January 1 and the latest sunrise is 3 minutes later at 6:25 AM on January 18.

The earliest sunset is 5:22 PM on January 1 and the latest sunset is 19 minutes later at 5:41 PM on January 31.

Daylight saving time is observed in Haiti during 2024, but it neither starts nor ends during January, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 6:12 AM and sets 13 hours, 17 minutes later, at 7:29 PM, while on December 21, the shortest day of the year, it rises at 6:18 AM and sets 10 hours, 59 minutes later, at 5:17 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for January 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Haiti is rapidly decreasing during January, falling from 56% to 45% over the course of the month.

For reference, on October 2, the muggiest day of the year, there are muggy conditions 98% of the time, while on February 12, the least muggy day of the year, there are muggy conditions 44% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Haiti is essentially constant during January, remaining within 0.1 miles per hour of 6.0 miles per hour throughout.

For reference, on July 1, the windiest day of the year, the daily average wind speed is 6.6 miles per hour, while on October 21, the calmest day of the year, the daily average wind speed is 4.8 miles per hour.

The highest daily average wind speed during January is 6.0 miles per hour on January 4.

The hourly average wind direction in Haiti throughout January is predominantly from the east, with a peak proportion of 64% on January 3.

Haiti is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Haiti is essentially constant during January, remaining around 81°F throughout.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Haiti are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Haiti are rapidly increasing during January, increasing by 878°F, from 30°F to 909°F, over the course of the month.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Haiti is gradually increasing during January, rising by 0.6 kWh, from 5.0 kWh to 5.6 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Haiti are 19.076 deg latitude, -72.296 deg longitude, and 0 ft elevation.

The topography within 2 miles of Haiti is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).

The area within 2 miles of Haiti is covered by trees (31%), grassland (31%), cropland (27%), and shrubs (11%), within 10 miles by cropland (55%) and grassland (22%), and within 50 miles by cropland (35%) and water (21%).