April Weather in Cox’s Bāzār Bangladesh

Daily high temperatures increase by 2°F, from 85°F to 87°F, rarely falling below 82°F or exceeding 91°F.

Daily low temperatures increase by 2°F, from 75°F to 77°F, rarely falling below 70°F or exceeding 81°F.

For reference, on May 22, the hottest day of the year, temperatures in Cox’s Bāzār typically range from 79°F to 88°F, while on January 12, the coldest day of the year, they range from 64°F to 77°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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.

Chetumal, Mexico (9,687 miles away); Batabanó, Cuba (9,372 miles); and Maintirano, Madagascar (4,245 miles) are the far-away foreign places with temperatures most similar to Cox’s Bāzār (view comparison).

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The month of April in Cox’s Bāzār experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 29% to 56%.

The clearest day of the month is April 1, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on August 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 91%, while on February 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 85%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Cox’s Bāzār, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 19% and ending it at 38%.

For reference, the year's highest daily chance of a wet day is 82% on July 14, and its lowest chance is 1% on January 19.

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 April in Cox’s Bāzār is very rapidly increasing, starting the month at 2.2 inches, when it rarely exceeds 5.3 inches, and ending the month at 6.5 inches, when it rarely exceeds 15.4 inches or falls below 1.0 inches.

Over the course of April in Cox’s Bāzār, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 34 minutes, implying an average daily increase of 1 minute, 9 seconds, and weekly increase of 8 minutes, 5 seconds.

The shortest day of the month is April 1, with 12 hours, 22 minutes of daylight and the longest day is April 30, with 12 hours, 55 minutes of daylight.

The latest sunrise of the month in Cox’s Bāzār is 5:44 AM on April 1 and the earliest sunrise is 23 minutes earlier at 5:21 AM on April 30.

The earliest sunset is 6:06 PM on April 1 and the latest sunset is 10 minutes later at 6:17 PM on April 30.

Daylight saving time is not observed in Cox’s Bāzār during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:10 AM and sets 13 hours, 26 minutes later, at 6:36 PM, while on December 21, the shortest day of the year, it rises at 6:25 AM and sets 10 hours, 50 minutes later, at 5:15 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 April 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 Cox’s Bāzār is increasing during April, rising from 93% to 100% over the course of the month.

For reference, on June 2, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 13, the least muggy day of the year, there are muggy conditions 8% 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 Cox’s Bāzār is essentially constant during April, remaining within 0.2 miles per hour of 6.6 miles per hour throughout.

For reference, on June 27, the windiest day of the year, the daily average wind speed is 10.5 miles per hour, while on October 8, the calmest day of the year, the daily average wind speed is 6.0 miles per hour.

The hourly average wind direction in Cox’s Bāzār throughout April is predominantly from the south, with a peak proportion of 62% on April 30.

Cox’s Bāzār 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 Cox’s Bāzār is gradually increasing during April, rising by 3°F, from 81°F to 84°F, over the course of the month.

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 Cox’s Bāzār 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 Cox’s Bāzār are very rapidly increasing during April, increasing by 922°F, from 2,227°F to 3,148°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 Cox’s Bāzār is gradually decreasing during April, falling by 0.7 kWh, from 6.1 kWh to 5.4 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Cox’s Bāzār are 21.440 deg latitude, 92.010 deg longitude, and 7 ft elevation.

The topography within 2 miles of Cox’s Bāzār contains only modest variations in elevation, with a maximum elevation change of 184 feet and an average elevation above sea level of 34 feet. Within 10 miles also contains only modest variations in elevation (328 feet). Within 50 miles contains only modest variations in elevation (3,494 feet).

The area within 2 miles of Cox’s Bāzār is covered by grassland (44%) and cropland (44%), within 10 miles by water (39%) and trees (21%), and within 50 miles by water (54%) and trees (30%).