April Weather in Itaguaí Brazil

Daily high temperatures decrease by 3°F, from 87°F to 84°F, rarely falling below 76°F or exceeding 94°F.

Daily low temperatures decrease by 4°F, from 71°F to 67°F, rarely falling below 62°F or exceeding 75°F.

For reference, on February 12, the hottest day of the year, temperatures in Itaguaí typically range from 74°F to 91°F, while on July 22, the coldest day of the year, they range from 62°F to 79°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.

San José de las Lajas, Cuba (4,087 miles away) is the far-away foreign place with temperatures most similar to Itaguaí (view comparison).

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The month of April in Itaguaí experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 52% to 32%.

The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 68% of the time.

For reference, on January 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 72%, while on August 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Itaguaí, the chance of a wet day over the course of April is very rapidly decreasing, starting the month at 43% and ending it at 27%.

For reference, the year's highest daily chance of a wet day is 65% on January 5, and its lowest chance is 15% on August 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 April in Itaguaí is very rapidly decreasing, starting the month at 4.8 inches, when it rarely exceeds 7.6 inches or falls below 2.0 inches, and ending the month at 2.6 inches, when it rarely exceeds 4.6 inches or falls below 0.9 inches.

Over the course of April in Itaguaí, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 35 minutes, implying an average daily decrease of 1 minute, 13 seconds, and weekly decrease of 8 minutes, 29 seconds.

The shortest day of the month is April 30, with 11 hours, 15 minutes of daylight and the longest day is April 1, with 11 hours, 51 minutes of daylight.

The earliest sunrise of the month in Itaguaí is 6:03 AM on April 1 and the latest sunrise is 11 minutes later at 6:14 AM on April 30.

The latest sunset is 5:53 PM on April 1 and the earliest sunset is 24 minutes earlier at 5:29 PM on April 30.

Daylight saving time is not observed in Itaguaí during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:07 AM and sets 13 hours, 33 minutes later, at 6:39 PM, while on June 20, the shortest day of the year, it rises at 6:34 AM and sets 10 hours, 44 minutes later, at 5:18 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 Itaguaí is very rapidly decreasing during April, falling from 93% to 69% over the course of the month.

For reference, on February 28, the muggiest day of the year, there are muggy conditions 98% of the time, while on July 22, the least muggy day of the year, there are muggy conditions 20% 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 Itaguaí is essentially constant during April, remaining within 0.2 miles per hour of 5.8 miles per hour throughout.

For reference, on September 14, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on February 22, the calmest day of the year, the daily average wind speed is 5.5 miles per hour.

The hourly average wind direction in Itaguaí throughout April is predominantly from the east, with a peak proportion of 38% on April 1.

Itaguaí 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 Itaguaí is gradually decreasing during April, falling by 2°F, from 78°F to 76°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 Itaguaí 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 Itaguaí are rapidly increasing during April, increasing by 756°F, from 6,926°F to 7,682°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 Itaguaí is essentially constant during April, remaining within 0.2 kWh of 4.9 kWh throughout.

For the purposes of this report, the geographical coordinates of Itaguaí are -22.852 deg latitude, -43.775 deg longitude, and 102 ft elevation.

The topography within 2 miles of Itaguaí contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 44 feet. Within 10 miles contains only modest variations in elevation (3,986 feet). Within 50 miles also contains extreme variations in elevation (6,358 feet).

The area within 2 miles of Itaguaí is covered by shrubs (36%), cropland (31%), grassland (17%), and trees (16%), within 10 miles by trees (37%) and water (20%), and within 50 miles by water (49%) and trees (26%).