December weather forecast
Caapiranga, Brazil

The first month of the summer, December, is still a hot month in Caapiranga, Brazil, with temperature in the range of an average high of 31.4°C (88.5°F) and an average low of 23.6°C (74.5°F).

Temperature

The onset of December brings an average high-temperature of a still tropical 31.4°C (88.5°F), nearly matching the November temperature. Caapiranga's nighttime temperature in December falls to an average of 23.6°C (74.5°F).

Heat index

December's heat index is estimated at a blisteringly hot 43°C (109.4°F). Note: Heat exhaustion and heat cramps are probable. Heatstroke can follow with prolonged activity.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In December, the average relative humidity in Caapiranga, Brazil, is 81%.

Rainfall

In Caapiranga, Brazil, during December, the rain falls for 27.5 days and regularly aggregates up to 196mm (7.72") of precipitation. Throughout the year, in Caapiranga, there are 269.3 rainfall days, and 1638mm (64.49") of precipitation is accumulated.

Daylight

December has the longest days of the year in Caapiranga, Brazil, with an average of 12h and 18min of daylight.
On the first day of December, sunrise is at 05:45 and sunset at 18:03. On the last day of the month, sunrise is at 05:58 and sunset at 18:17 -04.

Sunshine

In December, the average sunshine is 8.6h.

UV index

January, March through May and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: In December, the average maximum UV index of 6 translates into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.