December weather forecast
Calumbi, Brazil

The first month of the summer, December, is also a hot month in Calumbi, Brazil, with an average temperature ranging between max 33.3°C (91.9°F) and min 22.1°C (71.8°F).

Temperature

The advent of December brings an average high-temperature of a still tropical 33.3°C (91.9°F), almost identical to the preceding month. Calumbi's nights in December cool down to an average low-temperature of 22.1°C (71.8°F).

Heat index

For December, the heat index is calculated to be a fiery hot 38°C (100.4°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In Calumbi, the average relative humidity in December is 53%.

Rainfall

In Calumbi, in December, it is raining for 11.7 days, with typically 37mm (1.46") of accumulated precipitation. In Calumbi, during the entire year, the rain falls for 140.8 days and collects up to 430mm (16.93") of precipitation.

Daylight

The month with the longest days in Calumbi is December, with an average of 12h and 36min of daylight.
On the first day of the month, sunrise is at 05:05 and sunset at 17:38. On the last day of December, sunrise is at 05:18 and sunset at 17:53 -03.

Sunshine

The average sunshine in December in Calumbi, Brazil, is 9.1h.

UV index

February, March, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 7 during December translates into the following directions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.