December weather forecastArapiraca, Brazil

Weather in December

The first month of the summer, December, is also a hot month in Arapiraca, Brazil, with temperature in the range of an average high of 32°C (89.6°F) and an average low of 21.5°C (70.7°F).

Temperature

The commencement of December notes an average high-temperature of a still hot 32°C (89.6°F), exhibiting little difference from the previous month. In the month of December, an average of 21.5°C (70.7°F) marks the low-temperature.

Heat index

The average heat index in December is calculated to be a scorching 40°C (104°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

With an average relative humidity of 70%, December is the least humid month in Arapiraca, Brazil.

Rainfall

In Arapiraca, Brazil, in December, during 9.7 rainfall days, 22mm (0.87") of precipitation is typically accumulated. Throughout the year, in Arapiraca, Brazil, there are 194.5 rainfall days, and 384mm (15.12") of precipitation is accumulated.

Daylight

With an average of 12h and 42min of daylight, December has the longest days of the year.
On the first day of December in Arapiraca, Brazil, sunrise is at 04:56 and sunset at 17:35. On the last day of the month, sunrise is at 05:09 and sunset at 17:50 -03.

Sunshine

November and December, with an average of 8.3h of sunshine, are months with the most sunshine.

UV index

January through March, November and December, with an average maximum UV index of 7, are months with the highest UV index in Arapiraca. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 7 in December interprets into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.