December Weather at Campos–Bartolomeu Lysandro Airport Brazil

Daily high temperatures increase by 2°F, from 86°F to 88°F, rarely falling below 79°F or exceeding 94°F.

Daily low temperatures are around 74°F, rarely falling below 69°F or exceeding 77°F.

For reference, on February 14, the hottest day of the year, temperatures at Campos–Bartolomeu Lysandro Airport typically range from 75°F to 91°F, while on July 23, the coldest day of the year, they range from 65°F to 81°F.

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

Havana, Cuba (4,156 miles away) is the far-away foreign place with temperatures most similar to Campos–Bartolomeu Lysandro Airport (view comparison).

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The month of December at Campos–Bartolomeu Lysandro Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 71% throughout the month. The highest chance of overcast or mostly cloudy conditions is 73% on December 20.

The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 31% of the time.

For reference, on December 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on August 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 77%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Campos–Bartolomeu Lysandro Airport, the chance of a wet day over the course of December is essentially constant, remaining around 56% throughout.

For reference, the year's highest daily chance of a wet day is 59% on December 19, and its lowest chance is 8% on July 28.

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 December at Campos–Bartolomeu Lysandro Airport is essentially constant, remaining about 6.8 inches throughout, and rarely exceeding 11.1 inches or falling below 2.6 inches.

The highest average 31-day accumulation is 7.0 inches on December 13.

Over the course of December at Campos–Bartolomeu Lysandro Airport, the length of the day is essentially constant. The shortest day of the month is December 1, with 13 hours, 22 minutes of daylight and the longest day is December 21, with 13 hours, 28 minutes of daylight.

The earliest sunrise of the month at Campos–Bartolomeu Lysandro Airport is 4:53 AM on December 1 and the latest sunrise is 12 minutes later at 5:05 AM on December 31.

The earliest sunset is 6:15 PM on December 1 and the latest sunset is 16 minutes later at 6:31 PM on December 31.

Daylight saving time is not observed at Campos–Bartolomeu Lysandro Airport during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 4:59 AM and sets 13 hours, 28 minutes later, at 6:27 PM, while on June 20, the shortest day of the year, it rises at 6:22 AM and sets 10 hours, 49 minutes later, at 5:11 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 December 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 at Campos–Bartolomeu Lysandro Airport is gradually increasing during December, rising from 96% to 99% over the course of the month.

For reference, on February 4, the muggiest day of the year, there are muggy conditions 100% of the time, while on August 2, the least muggy day of the year, there are muggy conditions 55% 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 at Campos–Bartolomeu Lysandro Airport is essentially constant during December, remaining within 0.2 miles per hour of 9.7 miles per hour throughout.

For reference, on September 28, the windiest day of the year, the daily average wind speed is 11.1 miles per hour, while on March 31, the calmest day of the year, the daily average wind speed is 7.7 miles per hour.

The wind direction at Campos–Bartolomeu Lysandro Airport during December is predominantly out of the east from December 1 to December 18 and the north from December 18 to December 31.

Campos–Bartolomeu Lysandro Airport 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 at Campos–Bartolomeu Lysandro Airport is essentially constant during December, remaining around 75°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 at Campos–Bartolomeu Lysandro Airport 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 at Campos–Bartolomeu Lysandro Airport are rapidly increasing during December, increasing by 868°F, from 3,701°F to 4,568°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 at Campos–Bartolomeu Lysandro Airport is essentially constant during December, remaining within 0.1 kWh of 6.1 kWh throughout.

The lowest average daily incident shortwave solar energy during December is 6.0 kWh on December 19.