August Weather in Brazzaville Congo - Brazzaville

Daily high temperatures increase by 3°F, from 83°F to 86°F, rarely falling below 77°F or exceeding 91°F.

Daily low temperatures increase by 3°F, from 68°F to 70°F, rarely falling below 64°F or exceeding 73°F.

For reference, on April 2, the hottest day of the year, temperatures in Brazzaville typically range from 74°F to 90°F, while on July 17, the coldest day of the year, they range from 67°F to 82°F.

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

Santo Domingo, Dominican Republic (6,010 miles away) is the far-away foreign place with temperatures most similar to Brazzaville (view comparison).

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The month of August in Brazzaville experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 43% to 51%.

The clearest day of the month is August 1, with clear, mostly clear, or partly cloudy conditions 57% of the time.

For reference, on December 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on July 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 60%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Brazzaville, the chance of a wet day over the course of August is very rapidly increasing, starting the month at 3% and ending it at 14%.

For reference, the year's highest daily chance of a wet day is 87% on November 11, and its lowest chance is 2% on July 1.

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 August in Brazzaville is increasing, starting the month at 0.2 inches, when it rarely exceeds 0.8 inches or falls below -0.0 inches, and ending the month at 0.9 inches, when it rarely exceeds 2.1 inches or falls below 0.1 inches.

Over the course of August in Brazzaville, the length of the day is essentially constant. The shortest day of the month is August 1, with 11 hours, 56 minutes of daylight and the longest day is August 31, with 12 hours, 2 minutes of daylight.

The latest sunrise of the month in Brazzaville is 6:07 AM on August 1 and the earliest sunrise is 9 minutes earlier at 5:58 AM on August 31.

The latest sunset is 6:03 PM on August 3 and the earliest sunset is 3 minutes earlier at 5:59 PM on August 31.

Daylight saving time is not observed in Brazzaville during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:45 AM and sets 12 hours, 22 minutes later, at 6:08 PM, while on June 20, the shortest day of the year, it rises at 6:04 AM and sets 11 hours, 53 minutes later, at 5:56 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 August 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 Brazzaville is rapidly increasing during August, rising from 47% to 66% over the course of the month.

For reference, on April 22, the muggiest day of the year, there are muggy conditions 100% of the time, while on July 29, the least muggy day of the year, there are muggy conditions 47% 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 Brazzaville is essentially constant during August, remaining within 0.2 miles per hour of 5.8 miles per hour throughout.

For reference, on August 12, the windiest day of the year, the daily average wind speed is 6.0 miles per hour, while on November 30, the calmest day of the year, the daily average wind speed is 3.4 miles per hour.

The highest daily average wind speed during August is 6.0 miles per hour on August 12.

The hourly average wind direction in Brazzaville throughout August is predominantly from the west, with a peak proportion of 81% on August 18.

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 Brazzaville 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 Brazzaville are rapidly increasing during August, increasing by 769°F, from 736°F to 1,505°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 Brazzaville is essentially constant during August, remaining within 0.2 kWh of 5.4 kWh throughout.

The highest average daily incident shortwave solar energy during August is 5.5 kWh on August 29.

For the purposes of this report, the geographical coordinates of Brazzaville are -4.266 deg latitude, 15.283 deg longitude, and 932 ft elevation.

The topography within 2 miles of Brazzaville contains only modest variations in elevation, with a maximum elevation change of 266 feet and an average elevation above sea level of 928 feet. Within 10 miles contains only modest variations in elevation (1,070 feet). Within 50 miles also contains very significant variations in elevation (1,903 feet).

The area within 2 miles of Brazzaville is covered by artificial surfaces (72%) and water (28%), within 10 miles by shrubs (35%) and water (18%), and within 50 miles by shrubs (43%) and trees (36%).