January Weather in Petite-Île Réunion

Daily high temperatures are around 83°F, rarely falling below 80°F or exceeding 86°F. The highest daily average high temperature is 84°F on January 25.

Daily low temperatures are around 71°F, rarely falling below 68°F or exceeding 74°F.

For reference, on January 24, the hottest day of the year, temperatures in Petite-Île typically range from 71°F to 84°F, while on August 9, the coldest day of the year, they range from 60°F to 73°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.

Pouébo, New Caledonia (6,851 miles away) is the far-away foreign place with temperatures most similar to Petite-Île (view comparison).

© OpenStreetMap contributors

Compare Petite-Île to another city:

CompareMap

The month of January in Petite-Île experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 59% throughout the month. The highest chance of overcast or mostly cloudy conditions is 61% on January 13.

The clearest day of the month is January 26, with clear, mostly clear, or partly cloudy conditions 42% of the time.

For reference, on January 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, while on September 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 93%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Petite-Île, the chance of a wet day over the course of January is very rapidly increasing, starting the month at 22% and ending it at 33%.

For reference, the year's highest daily chance of a wet day is 35% on February 10, and its lowest chance is 5% on July 12.

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 Petite-Île is rapidly increasing, starting the month at 2.8 inches, when it rarely exceeds 5.5 inches or falls below 0.5 inches, and ending the month at 4.6 inches, when it rarely exceeds 8.6 inches or falls below 1.0 inches.

Over the course of January in Petite-Île, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 20 minutes, implying an average daily decrease of 41 seconds, and weekly decrease of 4 minutes, 46 seconds.

The shortest day of the month is January 31, with 13 hours, 4 minutes of daylight and the longest day is January 1, with 13 hours, 25 minutes of daylight.

The earliest sunrise of the month in Petite-Île is 5:38 AM on January 1 and the latest sunrise is 20 minutes later at 5:58 AM on January 31.

The latest sunset is 7:05 PM on January 16 and the earliest sunset is 2 minutes, 38 seconds earlier at 7:03 PM on January 31.

Daylight saving time is not observed in Petite-Île during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:32 AM and sets 13 hours, 26 minutes later, at 6:59 PM, while on June 20, the shortest day of the year, it rises at 6:54 AM and sets 10 hours, 50 minutes later, at 5:44 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 Petite-Île is increasing during January, rising from 85% to 94% over the course of the month.

For reference, on January 31, the muggiest day of the year, there are muggy conditions 94% of the time, while on August 17, the least muggy day of the year, there are muggy conditions 3% 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 Petite-Île is gradually increasing during January, increasing from 12.3 miles per hour to 13.3 miles per hour over the course of the month.

For reference, on July 24, the windiest day of the year, the daily average wind speed is 15.0 miles per hour, while on November 25, the calmest day of the year, the daily average wind speed is 11.0 miles per hour.

The hourly average wind direction in Petite-Île throughout January is predominantly from the east, with a peak proportion of 79% on January 1.

Petite-Île 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 Petite-Île is essentially constant during January, remaining within 1°F of 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 Petite-Île 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 Petite-Île are rapidly increasing during January, increasing by 815°F, from 3,659°F to 4,475°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 Petite-Île is essentially constant during January, remaining within 0.2 kWh of 6.9 kWh throughout.

For the purposes of this report, the geographical coordinates of Petite-Île are -21.350 deg latitude, 55.567 deg longitude, and 1,165 ft elevation.

The topography within 2 miles of Petite-Île contains large variations in elevation, with a maximum elevation change of 2,641 feet and an average elevation above sea level of 1,220 feet. Within 10 miles contains large variations in elevation (7,910 feet). Within 50 miles also contains extreme variations in elevation (10,026 feet).

The area within 2 miles of Petite-Île is covered by trees (58%), grassland (21%), and shrubs (14%), within 10 miles by water (55%) and trees (31%), and within 50 miles by water (91%).