December weather forecastManaíra, Brazil

Weather in December

The first month of the summer, December, is still a hot month in Manaíra, Brazil, with temperature in the range of an average low of 22.1°C (71.8°F) and an average high of 33.3°C (91.9°F).

Temperature

The arrival of December denotes a barely perceptible change in the average high-temperatures to a still hot 33.3°C (91.9°F) from November's 33.8°C (92.8°F). In December, the average low-temperature records at an agreeable 22.1°C (71.8°F) during the nights.

Heat index

December's heat index is estimated at a fiery hot 38°C (100.4°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. 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 body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

The average relative humidity in December is 53%.

Rainfall

In Manaíra, in December, during 11.7 rainfall days, 37mm (1.46") of precipitation is typically accumulated. In Manaíra, 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 Manaíra 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 17:52 -03.

Sunshine

In Manaíra, the average sunshine in December 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 hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 7 in December, converts into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.